Java for，

Java for，

        //一般用法
        for(int i =1; i <5 ; i++){
             System.out.println("i = " + i );
        }
        //使用,操作符
        for(int i =1 , j = i + 10; i <5 ; i++, j = i * 2){
             System.out.println("i = " + i + " j = " + j);
        }
        //遍历字符窜集合
        for(char c : "ABCDEFG".toCharArray()){
            System.out.print(c+ " " );
        }
        //遍历数组
        for(int i : new int[]{1,3,4,5}){
            System.out.print(i+ " " );
        }
          //标签
        tofor:
        for(int i = 1; i < 5 ; i++){
            System.out.println("i =" + i);
            for(int j = 1 ; j < 5 ; j++){
                if(j == 3) continue tofor;
                System.out.print(j+" ");
            }
            System.out.println();

        }