8.3-跳转语句

一、break语句——终止循环

break \\不带标签

break label \\带标签跳转，label是标签名

public class HelloWorld {

public static void main(String[] args) {

int numbers[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

for (int i = 0; i < numbers.length; i++) {

if (i == 3) {

// 跳出循环

break;

}

System.out.println("Count is: " + i);

}

label1: for (int x = 0; x < 5; x++) {

for (int y = 5; y > 0; y--) {

if (y == x) {

// 跳转到label1指向的外循环

break label1;

}

System.out.printf("(x,y) = (%d,%d)", x, y);

// 打印一个换行符，实现换行

System.out.println();

}

}

System.out.println("Game Over!");

}

}

输出结果：

Count is: 0

Count is: 1

Count is: 2

(x,y) = (0,5)

(x,y) = (0,4)

(x,y) = (0,3)

(x,y) = (0,2)

(x,y) = (0,1)

(x,y) = (1,5)

(x,y) = (1,4)

(x,y) = (1,3)

(x,y) = (1,2)

Game Over!

二、continue语句——终止当次循环，continue之后的语句不再执行，直接跳转到下一次循环中

continue \\不带标签

continue label \\带标签，label是标签名

public class HelloWorld {

public static void main(String[] args) {

int numbers[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

for (int i = 0; i < numbers.length; i++) {

if (i == 3) {

// 跳出循环

continue;

}

System.out.println("Count is: " + i);

}

label1: for (int x = 0; x < 5; x++) {

for (int y = 5; y > 0; y--) {

if (y == x) {

// 跳转到label1指向的外循环

continue label1;

}

System.out.printf("(x,y) = (%d,%d)", x, y);

// 打印一个换行符，实现换行

System.out.println();

}

}

System.out.println("Game Over!");

}

}

输出结果：

Count is: 0

Count is: 1

Count is: 2

Count is: 4

Count is: 5

Count is: 6

Count is: 7

Count is: 8

Count is: 9

(x,y) = (0,5)

(x,y) = (0,4)

(x,y) = (0,3)

(x,y) = (0,2)

(x,y) = (0,1)

(x,y) = (1,5)

(x,y) = (1,4)

(x,y) = (1,3)

(x,y) = (1,2)

(x,y) = (2,5)

(x,y) = (2,4)

(x,y) = (2,3)

(x,y) = (3,5)

(x,y) = (3,4)

(x,y) = (4,5)

Game Over!