Java创建类的几种方式

Object a = new Object();

class EmpObj{
    private String name;

    public EmpObj() {
    }

    public String getName() {
        return name;
    }

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

		 String s = EmpObj.class.toString();
        String s1 = s.split(" ")[1];


        Class aClass = Class.forName(s1);
         EmpObj emp = (EmpObj) aClass.newInstance();
        System.out.println(emp);

或者

		EmpObj empObj = EmpObj.class.newInstance();
        System.out.println(empObj);

 		Constructor constructor = EmpObj.class.getConstructor();
        EmpObj emp = constructor.newInstance();
        System.out.println(emp);

该方法需要在被克隆类中重新clone()方法,并且实现Cloneable接口，否则将会报错（CloneNotSupportedException）

	@Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

	EmpObj empObj = new EmpObj();
        EmpObj newObj = (EmpObj) empObj.clone();
        System.out.println(newObj);

注意：类应该先实现接口（Serializable ）

  // 序列化写入过程
        ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream("obj.ser"));
        EmpObj empObj = new EmpObj();
        outputStream.writeObject(empObj);
        outputStream.close();


        // 反序列化读取
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("obj.ser"));
        EmpObj o = (EmpObj) in.readObject();
        System.out.println(o);

完整代码

package JTang.Test2;

import java.io.*;
import java.lang.reflect.Constructor;
import java.util.EnumMap;

public class TestCreatObject {
    public static void main(String[] args) throws Exception {
//        String s = EmpObj.class.toString();
//        String s1 = s.split(" ")[1];
//
//
//        Class aClass = Class.forName(s1);
//         EmpObj emp = (EmpObj) aClass.newInstance();
//        System.out.println(emp);

//        EmpObj empObj = EmpObj.class.newInstance();
//        System.out.println(empObj);

//        Constructor constructor = EmpObj.class.getConstructor();
//        EmpObj emp = constructor.newInstance();
//        System.out.println(emp);

//        EmpObj empObj = new EmpObj();
//        empObj.setName("zs");
//        EmpObj newObj = (EmpObj) empObj.clone();
//        System.out.println(newObj);
        // 序列化写入过程
        ObjectOutputStream outputStream = new ObjectOutputStream(new FileOutputStream("obj.ser"));
        EmpObj empObj = new EmpObj();
        outputStream.writeObject(empObj);
        outputStream.close();


        // 反序列化读取
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("obj.ser"));
        EmpObj o = (EmpObj) in.readObject();
        System.out.println(o);

    }
}
    class EmpObj implements Cloneable, Serializable {
    private String name;

    public EmpObj() {
    }


    public String getName() {
        return name;
    }

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

    @Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}