一、实验目的

二、实验内容

三、程序清单

I.Abstract包

Point类（其实并没有用上）

II.FileOperate包

ReadFile接口

WriteFile接口

III.Geometry包

Objects类（图形父类）

Circle类

Triangle类

Rectangle类

IV.WindowDraw包

MainWindow类

CirWindow类

TriWindow类

RecWindow类

ReadWindow类

SaveWindow类

SaveSuccess类

V.Action类（主函数所在）

四、程序测试

一、实验目的
通过图形类实验体现继承封装和多态，类之间的关系，并应用高级特征（包括接口、抽象类、包等）、输入输出流、异常处理、窗口、事件等。

二、实验内容
编写并调试程序，实现构造圆形、三角形、矩形类。每一个类都单独用一个文件存放。

圆形类：包括圆心、半径、周长、面积。

三角形类：包括三边、周长、面积。

矩形类：包括长、宽、周长、面积。

根据输入求图形的周长、面积。

实现文件的输入输出流，将求得的图形周长与面积保存在文件中，在适当时机可以读取。

实现容错处理，检测任何不合规的输入，并给出必要提示。

优化交互界面，让非专业者（陌生人）也能顺利完成运算。

三、程序清单

I.Abstract包

Point类（其实并没有用上）

package Abstract;

import java.io.Serializable;

public class Point implements Serializable {
    private int x;//x坐标
    private int y;//y坐标

    public int getX() {
        return x;
    }

    public void setX(int x) {
        this.x = x;
    }

    public int getY() {
        return y;
    }

    public void setY(int y) {
        this.y = y;
    }
}

II.FileOperate包

ReadFile接口

package FileOperate;

import Geometry.Objects;

public interface ReadFile {
    Objects readFile(String ads);
}

WriteFile接口

package FileOperate;

import Geometry.Objects;

public interface WriteFile {
    void writeFile(Objects obj, String ads);
}

III.Geometry包

Objects类（图形父类）

package Geometry;

import Abstract.Point;

import java.io.Serializable;

public abstract class Objects implements Serializable {
    private String name;//图形名称
    static double PI = Math.PI;
    private Point O = new Point();//几何图形中心
    double peri;//图形周长
    double area;//图形面积

    public Point getO() {
        return O;
    }

    public void setO(Point o) {
        O = o;
    }

    public double getPeri() {
        return peri;
    }

    public double getArea() {
        return area;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

Circle类

package Geometry;


public class Circle extends Objects {
    private int r;//圆的半径

    public Circle(){
        setName("圆形");
    }
    public Circle(int r){
        setName("圆形");
        this.r = r;
        peri = PI*r*2;
        area = PI*r*r;
    }

    @Override
    public double getPeri() {
        return peri;
    }

    @Override
    public double getArea() {
        return area;
    }

    public double getR() {
        return r;
    }

    public void setR(int r) {
        this.r = r;
    }
}

Triangle类

package Geometry;

import Abstract.Point;

public class Triangle extends Objects {
    private Point A = new Point();
    private Point B = new Point();
    private Point C = new Point();

    private int a;
    private int b;
    private int c;

    public Triangle(){
        setName("三角形");
    }
    public Triangle(int a,int b,int c){
        setName("三角形");
        this.a = a;
        this.b = b;
        this.c = c;
        peri = a+b+c;
        double p = peri / 2;
        area = Math.sqrt(p *(p -a)*(p -b)*(p -c));
    }

    @Override
    public double getPeri() {
        return peri;
    }

    @Override
    public double getArea() {
        return area;
    }
}

Rectangle类

package Geometry;

import Abstract.Point;


public class Rectangle extends Objects {
    private Point A = new Point();
    private Point B = new Point();
    private Point C = new Point();
    private Point D = new Point();

    private int length;
    private int width;


    public Rectangle(){
        setName("矩形");
    }
    public Rectangle(int length,int width){
        setName("矩形");
        this.length = length;
        this.width = width;
        peri = length*2+width*2;
        area = length*width;
    }
    @Override
    public double getPeri() {
        return peri;
    }

    @Override
    public double getArea() {
        return area;
    }

    public int getLength() {
        return length;
    }

    public void setLength(int length) {
        this.length = length;
    }

    public int getWidth() {
        return width;
    }

    public void setWidth(int width) {
        this.width = width;
    }
}

IV.WindowDraw包

MainWindow类

package WindowDraw;

import FileOperate.ReadFile;
import Geometry.Objects;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class MainWindow extends Jframe implements ReadFile {
    //判断文件是否存在，存在为1，不存在为0
    public static int state = 1;
    JLabel s,p,rem;
    TextField ad;
    JButton cir, tri, rec, read;
    public MainWindow(){
        setVisible(true);//设置窗口是否可见
        setTitle("几何图形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,800,600);
        setDefaultCloseOperation(EXIT_ON_CLOSE);//关闭窗口的方法（点击右上角叉号关闭程序）
        setLayout(null);
        init();
    }

    void init(){
        s = new JLabel("请选择想要构造的图形：");
        setStyle(s,1,1,800,70,70);
        cir = new JButton("圆形");
        setStyle(cir,150,120,120,50,25);
        tri = new JButton("三角形");
        setStyle(tri,350,120,120,50,25);
        rec = new JButton("矩形");
        setStyle(rec,550,120,120,50,25);
        p = new JLabel("或输入想要读取的文件名：");
        setStyle(p,20,250,800,70,60);
        read = new JButton("确定");
        setStyle(read,340,450,120,50,25);

        rem = new JLabel("文件不存在，请重新输入！");
        rem.setForeground(Color.white);
        setStyle(rem,270,400,300,50,20);
        ad = new TextField();
        ad.setBounds(250,350,300,30);
        ad.setFont(new Font("宋体",Font.BOLD,20));
        add(ad);
        buttonAction(cir);
        buttonAction(tri);
        buttonAction(rec);
        buttonAction(read);
    }

    void buttonAction(JButton b){
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if(java.util.Objects.equals(b.getText(), "圆形")) {
                    dispose();
                    CirWindow win = new CirWindow();
                }
                else if(java.util.Objects.equals(b.getText(), "三角形")) {
                    dispose();
                    TriWindow win = new TriWindow();
                }
                else if(java.util.Objects.equals(b.getText(),"矩形")){
                    dispose();
                    RecWindow win = new RecWindow();
                }
                else if(java.util.Objects.equals(b.getText(),"确定")){
                    String addr = ad.getText()+".txt";
                    Objects obj = readFile(addr);
                    if(state==1){
                        ReadWindow win = new ReadWindow(obj);
                        rem.setForeground(Color.white);
                        ad.setText(null);
                    }else {
                        ad.setText(null);
                        rem.setForeground(Color.red);
                        state = 1;
                    }
                }
            }
        });
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }

    @Override
    public Objects readFile(String ads) {
        File file = new File(ads);
        try{
            FileInputStream fileIn = new FileInputStream(file);
            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
            Objects obj = (Objects) objectIn.readObject();
            objectIn.close();
            return obj;
        } catch (IOException | ClassNotFoundException e) {
            MainWindow.state = 0;
        }
        return null;
    }
}

CirWindow类

package WindowDraw;

import Geometry.Circle;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class CirWindow extends Jframe implements ActionListener {
    JLabel rem;
    TextField r,peri,area;
    JButton act,rtn,save,clear;
    Circle cir;
    public CirWindow(){
        setVisible(true);//设置窗口是否可见
        setTitle("圆形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,800,600);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        setStyle(new JLabel("请输入半径："),150,100,250,30,30);
        r = new TextField();
        r.setBounds(450,100,200,30);
        r.setFont(new Font("宋体",Font.BOLD,20));
        add(r);

        setStyle(new JLabel("该圆形周长为："),150,200,250,30,30);
        peri = new TextField();
        setTA(peri,450,200);
        setStyle(new JLabel("该圆形面积为："),150,300,250,30,30);
        area = new TextField();
        setTA(area,450,300);

        rem = new JLabel();
        rem.setForeground(Color.red);
        setStyle(rem,470,130,300,50,20);

        act = new JButton("确定");
        rtn = new JButton("返回");
        save = new JButton("保存");
        clear = new JButton("清空");
        setStyle(act,120,400,120,50,25);
        setStyle(rtn,270,400,120,50,25);
        setStyle(save,420,400,120,50,25);
        setStyle(clear,570,400,120,50,25);
        act.addActionListener(this);
        rtn.addActionListener(this);
        save.addActionListener(this);
        clear.addActionListener(this);
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }
    void setTA(TextField tf,int x,int y){
        tf.setBounds(x,y,200,30);
        tf.setFont(new Font("宋体",Font.BOLD,20));
        tf.setEditable(false);
        add(tf);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==act){
            try{
                cir = new Circle(Integer.parseInt(r.getText()));
                if(cir.getR()<=0){
                    rem.setText("请输入正整数！");
                    r.setText(null);
                    peri.setText(null);
                    area.setText(null);
                }
                else{
                    rem.setText(null);
                    peri.setText(String.valueOf(cir.getPeri()));
                    area.setText(String.valueOf(cir.getArea()));
                    rem.setForeground(Color.white);
                }
            } catch (NumberFormatException numberFormatException) {
                rem.setText("请输入正整数！");
                r.setText(null);
                peri.setText(null);
                area.setText(null);
            }
        }
        if(e.getSource()==rtn){
            dispose();
            MainWindow win = new MainWindow();
        }
        if(e.getSource()==clear){
            r.setText(null);
            area.setText(null);
            peri.setText(null);
        }
        if(e.getSource()==save){
            SaveWindow win = new SaveWindow(cir);
        }
    }
}

TriWindow类

package WindowDraw;

import Geometry.Circle;
import Geometry.Triangle;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;


public class TriWindow extends Jframe implements ActionListener {
    JLabel rem;
    TextField a,b,c,peri,area;
    JButton act,rtn,save,clear;
    Triangle tri;
    public TriWindow(){
        setVisible(true);//设置窗口是否可见
        setTitle("三角形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,800,600);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        setStyle(new JLabel("请输入a边长："),150,60,250,30,30);
        a = new TextField();
        a.setBounds(450,60,200,30);
        a.setFont(new Font("宋体",Font.BOLD,20));
        add(a);
        setStyle(new JLabel("请输入b边长："),150,120,250,30,30);
        b = new TextField();
        b.setBounds(450,120,200,30);
        b.setFont(new Font("宋体",Font.BOLD,20));
        add(b);
        setStyle(new JLabel("请输入c边长："),150,180,250,30,30);
        c = new TextField();
        c.setBounds(450,180,200,30);
        c.setFont(new Font("宋体",Font.BOLD,20));
        add(c);

        setStyle(new JLabel("该三角形周长为："),150,260,270,30,30);
        peri = new TextField();
        setTA(peri,450,260);
        setStyle(new JLabel("该三角形面积为："),150,320,270,30,30);
        area = new TextField();
        setTA(area,450,320);

        rem = new JLabel();
        rem.setForeground(Color.red);
        setStyle(rem,460,210,300,50,20);

        act = new JButton("确定");
        rtn = new JButton("返回");
        save = new JButton("保存");
        clear = new JButton("清空");
        setStyle(act,120,400,120,50,25);
        setStyle(rtn,270,400,120,50,25);
        setStyle(save,420,400,120,50,25);
        setStyle(clear,570,400,120,50,25);
        act.addActionListener(this);
        rtn.addActionListener(this);
        save.addActionListener(this);
        clear.addActionListener(this);
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }
    void setTA(TextField tf,int x,int y){
        tf.setBounds(x,y,200,30);
        tf.setFont(new Font("宋体",Font.BOLD,20));
        tf.setEditable(false);
        add(tf);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==act){
            try{
                tri = new Triangle(Integer.parseInt(a.getText()),Integer.parseInt(b.getText()),Integer.parseInt(c.getText()));
                if(Double.isNaN(tri.getArea())||tri.getArea()==0){
                    rem.setText("请输入正确的三角形！");
                    a.setText(null);
                    b.setText(null);
                    c.setText(null);
                    peri.setText(null);
                    area.setText(null);
                }
                else{
                    rem.setText(null);
                    peri.setText(String.valueOf(tri.getPeri()));
                    area.setText(String.valueOf(tri.getArea()));
                }
            } catch (NumberFormatException numberFormatException) {
                rem.setText("请输入正整数！");
                a.setText(null);
                b.setText(null);
                c.setText(null);
                peri.setText(null);
                area.setText(null);
            }
        }
        else if(e.getSource()==rtn){
            dispose();
            MainWindow win = new MainWindow();
        }
        else if(e.getSource()==clear){
            a.setText(null);
            b.setText(null);
            c.setText(null);
            peri.setText(null);
            area.setText(null);
        }
        if(e.getSource()==save){
            SaveWindow win = new SaveWindow(tri);
        }
    }
}

RecWindow类

package WindowDraw;

import Geometry.Rectangle;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class RecWindow extends Jframe implements ActionListener {
    JLabel rem;
    TextField l,w,peri,area;
    JButton act,rtn,save,clear;
    Rectangle rec;
    public RecWindow(){
        setVisible(true);//设置窗口是否可见
        setTitle("矩形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,800,600);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        setStyle(new JLabel("请输入长："),150,60,250,30,30);
        l = new TextField();
        l.setBounds(450,60,200,30);
        l.setFont(new Font("宋体",Font.BOLD,20));
        add(l);
        setStyle(new JLabel("请输入宽："),150,140,250,30,30);
        w = new TextField();
        w.setBounds(450,140,200,30);
        w.setFont(new Font("宋体",Font.BOLD,20));
        add(w);

        setStyle(new JLabel("该矩形周长为："),150,220,250,30,30);
        peri = new TextField();
        setTA(peri,450,220);
        setStyle(new JLabel("该矩形面积为："),150,300,250,30,30);
        area = new TextField();
        setTA(area,450,300);

        rem = new JLabel();
        rem.setForeground(Color.red);
        setStyle(rem,460,170,300,50,20);

        act = new JButton("确定");
        rtn = new JButton("返回");
        save = new JButton("保存");
        clear = new JButton("清空");
        setStyle(act,120,400,120,50,25);
        setStyle(rtn,270,400,120,50,25);
        setStyle(save,420,400,120,50,25);
        setStyle(clear,570,400,120,50,25);
        act.addActionListener(this);
        rtn.addActionListener(this);
        save.addActionListener(this);
        clear.addActionListener(this);
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }
    void setTA(TextField tf,int x,int y){
        tf.setBounds(x,y,200,30);
        tf.setFont(new Font("宋体",Font.BOLD,20));
        tf.setEditable(false);
        add(tf);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==act){
            try{
                rec = new Rectangle(Integer.parseInt(l.getText()),Integer.parseInt(w.getText()));
                if(rec.getLength()

ReadWindow类

package WindowDraw;

import Geometry.*;
import javax.swing.*;
import java.awt.*;

public class ReadWindow extends Jframe {
    Objects obj;
    JLabel s,pp,aa;
    TextField peri,area;
    public ReadWindow(Objects obj){
        this.obj = obj;
        setVisible(true);//设置窗口是否可见
        setTitle("读取图形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,400,400);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        s = new JLabel("该图形为"+obj.getName());
        setStyle(s,1,1,400,30,30);
        pp = new JLabel("周长为：");
        setStyle(pp,1,100,150,30,30);
        aa = new JLabel("面积为：");
        setStyle(aa,1,200,150,30,30);

        peri = new TextField();
        area = new TextField();
        setTA(peri,160,100,obj.getPeri());
        setTA(area,160,200,obj.getArea());
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }

    void setTA(TextField tf,int x,int y,double info){
        tf.setBounds(x,y,200,30);
        tf.setFont(new Font("宋体",Font.BOLD,20));
        tf.setText(String.valueOf(info));
        tf.setEditable(false);
        add(tf);
    }
}

SaveWindow类

package WindowDraw;

import FileOperate.WriteFile;
import Geometry.Objects;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class SaveWindow extends Jframe implements ActionListener, WriteFile {
    TextField ad;
    JButton save,cancel;
    Objects obj;
    public SaveWindow(Objects obj){
        this.obj = obj;
        setVisible(true);//设置窗口是否可见
        setTitle("");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,400,400);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        setStyle(new JLabel("请输入保存地址："),50,100,300,30,30);
        ad = new TextField();
        setTA(ad,100,170);

        save = new JButton("保存");
        cancel = new JButton("取消");
        setStyle(save,70,250,120,50,25);
        setStyle(cancel,200,250,120,50,25);

        save.addActionListener(this);
        cancel.addActionListener(this);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==save){
            try{
                String addr = ad.getText()+".txt";
                writeFile(obj,addr);
            } catch (Exception exception) {
                ad.setText("请输入正确的地址");
            }
            SaveSuccess win = new SaveSuccess();
            dispose();
        }
        else if(e.getSource()==cancel){
            dispose();
        }
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }
    void setTA(TextField tf,int x,int y){
        tf.setBounds(x,y,200,30);
        tf.setFont(new Font("宋体",Font.BOLD,20));
        add(tf);
    }

    @Override
    public void writeFile(Objects obj, String ads) {
        File file = new File(ads);
        try{
            FileOutputStream fileOut = new FileOutputStream(file);
            ObjectOutputStream objectOut = new ObjectOutputStream(fileOut);
            objectOut.writeObject(obj);
            objectOut.close();
        } catch (IOException e) {
            System.out.println("请输入正确的地址");
        }
    }
}

SaveSuccess类

package WindowDraw;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Objects;

public class SaveSuccess extends Jframe {
    JButton goon;
    public SaveSuccess(){
        setVisible(true);//设置窗口是否可见
        setTitle("保存图形");//设置窗口标题
        setLocationRelativeTo(null);//使窗口居中
        setBounds(100,100,300,300);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);//关闭窗口的方法
        setLayout(null);
        init();
    }
    void init(){
        setStyle(new JLabel("保存成功！"),80,90,200,30,30);
        goon = new JButton("确定");
        setStyle(goon,90,170,120,50,25);
        buttonAction(goon);
    }
    void buttonAction(JButton b){
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if(Objects.equals(b.getText(), "确定")) {
                    dispose();
                }
            }
        });
    }

    void setStyle(JComponent jc,int x,int y,int width,int height,int size){
        jc.setPreferredSize(new Dimension(width,height));
        jc.setBounds(x,y,width,height);
        jc.setFont(new Font("华文行楷", Font.BOLD,size));
        add(jc);
    }
}

V.Action类（主函数所在）

import WindowDraw.MainWindow;

public class Action {
    public static void main(String[] args) {
        MainWindow win = new MainWindow();
    }
}

Java实验大作业——图形类

一、实验目的
通过图形类实验体现继承封装和多态，类之间的关系，并应用高级特征（包括接口、抽象类、包等）、输入输出流、异常处理、窗口、事件等。

三、程序清单

Point类（其实并没有用上）

II.FileOperate包

ReadFile接口
package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); }

WriteFile接口
package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

ReadFile接口
package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); }

WriteFile接口
package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

V.Action类（主函数所在）
import WindowDraw.MainWindow; public class Action { public static void main(String[] args) { MainWindow win = new MainWindow(); } }

四、程序测试
程序功能实现截图如下

Java相关栏目本月热门文章

Java实验大作业——图形类

一、实验目的 通过图形类实验体现继承封装和多态，类之间的关系，并应用高级特征（包括接口、抽象类、包等）、输入输出流、异常处理、窗口、事件等。

三、程序清单

Point类（其实并没有用上）

II.FileOperate包 ReadFile接口 package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); } WriteFile接口 package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

ReadFile接口 package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); }

WriteFile接口 package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

V.Action类（主函数所在） import WindowDraw.MainWindow; public class Action { public static void main(String[] args) { MainWindow win = new MainWindow(); } }

四、程序测试 程序功能实现截图如下

Java相关栏目本月热门文章

一、实验目的
通过图形类实验体现继承封装和多态，类之间的关系，并应用高级特征（包括接口、抽象类、包等）、输入输出流、异常处理、窗口、事件等。

II.FileOperate包

ReadFile接口
package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); }

WriteFile接口
package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

ReadFile接口
package FileOperate; import Geometry.Objects; public interface ReadFile { Objects readFile(String ads); }

WriteFile接口
package FileOperate; import Geometry.Objects; public interface WriteFile { void writeFile(Objects obj, String ads); }

V.Action类（主函数所在）
import WindowDraw.MainWindow; public class Action { public static void main(String[] args) { MainWindow win = new MainWindow(); } }

四、程序测试
程序功能实现截图如下