arrays类讲解

//package java.array;

import java.util.Arrays;

public class arrayDome6 {
    public static void main(String[] args) {
        int[] a = {1,2,20,202};
        System.out.println(Arrays.toString(a));//打印数组元素
		Arrays.sort(a);//排序
        printArray(a);//结果一样
    }
    public static void printArray(int[] a){
        for (int i=0; i <a.length ; i++) {
            if (i==0){
                System.out.print("{ ");
            }
            if (i==a.length-1){
                System.out.print(a[i] + "}");
            }else{
                System.out.print(a[i] + ", ");
            }
        }

    }
}