Arrays类的讲解（重点）

import java.util.Arrays;

//Arrays类
public class Main11 {
    public static void main(String[] args){
        int[] a={1,2,3,4,5};
        //打印数组元素Arrays.toString
        System.out.println(Arrays.toString(a));
        print(a);

    }
    public static void print(int[] c){
        for (int i=0;i 
运行结果：
 
[1, 2, 3, 4, 5]
[1 ,2 ,3 ,4 ,5]
Process finished with exit code 0
 
Arrays.toString 
 
数组进行排序 
Arrays.sort 
import java.util.Arrays;

//数组的排序
public class Main12 {
    public static void main(String[] args){
        int[] a={12,43,55,23,12,65,0};
        Arrays.sort(a);//数组进行排序
        System.out.println(Arrays.toString(a));
        int[] c={23,43,21,12,15,2,53,15,89};
        paixu(c);
        System.out.println(Arrays.toString(c));

    }
    //冒泡排序
    public static int[] paixu(int[] b){

        for (int i = 0; i < b.length - 1; i++) {
            for (int j = i+1; j  
[0, 12, 12, 23, 43, 55, 65]
[89, 53, 43, 23, 21, 15, 15, 12, 2]

Process finished with exit code 0

 
数组的填充 
//数组的填充
public class Main13 {
    public static void main(String[] args){
        int[] a={1,2,3,4,5,6};
        Arrays.fill(a,0);
        System.out.println(Arrays.toString(a));//[0,0,0,0,0,0]
        int[] b={2,3,5,6,7,8,9,2,4,5};
        Arrays.fill(b,2,4,0);
        System.out.print(Arrays.toString(b));//[2,3,0,0,7,8,9,2,4,5]
    }
}

 
运行结果
 
[0, 0, 0, 0, 0, 0]
[2, 3, 0, 0, 7, 8, 9, 2, 4, 5]
Process finished with exit code 0
 
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