java中没有goto，但是goto是保留字。例如int goto;是不合法的。
但是java中有标签，仅作用在多重循环的continue和break中。
continue和break只能作用于本层循环，但是有了标签可以直接跳出多重循环。
代码举例：
public class Main {
public static void main(String[] args) {
first: // 标签与循环直接不可以加语句
for (int i = 0; i < 3; ++i) {
System.out.println("
first: " + (i + 1) + " times start");
second:
for (int j = 0; j < 2; ++j) {
System.out.println(" second: " + (j + 1) + " times start");
if (i == 1 && j == 1) {
System.out.println(" ----break----");
break;
}
for (int k = 0; k < 2; ++k) {
System.out.println(" third: " + (k + 1) + " times start");
if (i == 1 && j == 0 && k == 0) {
System.out.println(" ----continue----");
continue;
}
if (i == 2 && j == 0) {
System.out.println(" ----continue second----");
continue second;
}
if (i == 2 && j == 1 && k == 1) {
System.out.println(" ----break first----");
break first;
}
System.out.println(" third: " + (k + 1) + " times end");
}
System.out.println(" second: " + (j + 1) + " times end");
}
System.out.println("first: " + (i + 1) + " times end");
}
}
}
输出：
first: 1 times start second: 1 times start third: 1 times start third: 1 times end third: 2 times start third: 2 times end second: 1 times end second: 2 times start third: 1 times start third: 1 times end third: 2 times start third: 2 times end second: 2 times end first: 1 times end first: 2 times start second: 1 times start third: 1 times start ----continue---- third: 2 times start third: 2 times end second: 1 times end second: 2 times start ----break---- first: 2 times end first: 3 times start second: 1 times start third: 1 times start ----continue second---- second: 2 times start third: 1 times start third: 1 times end third: 2 times start ----break first----