Arrays类

import java.util.Arrays;

public class Demo05 {
public static void main(String[] args) {
int []a={111,2,5,6,999,7777,2,33,};

    //打印数组元素--Arrays.toString
    //System.out.println(Arrays.toString(a));
    //printArray(a);

    Arrays.sort(a);//数组进行排序
    System.out.println(Arrays.toString(a));
}

//自己定义打印数组元素的输出样式
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]+", ");
        }


    }
}

}