java流程控制 break,continue,与label

break

跳出当前for循环

        for (int i = 0; i < 4; i++) {
            if (i == 2) {
                break;
            }
            System.out.println(i);
        }

运行结果

0
1

continue

终止循环本次操作，继续下次循环

        for (int i = 0; i < 4; i++) {
            if (i == 2) {
                continue;
            }
            System.out.println(i);
        }

运行结果

0
1
3

continue label

终止循环本次操作，从标记label处继续下次循环

        System.out.println("begin");

        outer: 
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                if (i == 1 && j == 1) {
                    continue outer;
                }
                System.out.println("i=" + i + ",j=" + j);
            }
        }

        System.out.println("over");

运行结果

begin
i=0,j=0
i=0,j=1
i=0,j=2
i=1,j=0
i=2,j=0
i=2,j=1
i=2,j=2
over

break label

终止label后的循环，跳出多层循环

        System.out.println("begin");

        outer: 
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                if (i == 1 && j == 1) {
                    break outer;
                }
                System.out.println("i=" + i + ",j=" + j);
            }
        }

        System.out.println("over");

运行结果

begin
i=0,j=0
i=0,j=1
i=0,j=2
i=1,j=0
over