foeach集合遍历

package number;

public class Number {
	public static void main(String[] args) {
		int[] arr={5,2,1,0,3,6,8,7};
		int[] index={2,0,3,5,1,3,5,3,6,5,7};
		String tel="";
		for(int i:index){
			System.out.println(i);
			System.out.println("xx"+arr[i]);
		}
		System.out.println(tel);
	}

}

结果　

2
xx1
0
xx5
3
xx0
5
xx6
1
xx2
3
xx0
5
xx6
3
xx0
6
xx8
5
xx6
7
xx7

for(int i:index){
　　System.out.println(i);}表示逐个输出集合元素