for-each的用法:
int a[] = {1,2,3,4,5,6} for(int s:a){ System.out.println(s); }
他完全等价于:
int a[] = {1,2,3,4,5,6}; for(int i = 0;i<a.length;i++){ System.out.println(a[i]); }
int a[] = {1,2,3,4,5,6} for(int s:a){ System.out.println(s); }
int a[] = {1,2,3,4,5,6}; for(int i = 0;i<a.length;i++){ System.out.println(a[i]); }