java break 用法之当goto用 - SKY外语计算机学习

for (int i = 0; i<3; i++){

System. out .println("i = " + i);

for (int j = 0;j<100;j++){

if (j == 8) break;

System. out .print(" j = " +j);

}

System. out .println("In signal 1" );

}

System. out .println("out Loops " );

}

如果我们想实现break跳出所有循环呢：

public class Break {
   public static void main(String args[]) {
boolean sig = false;
         signal1: for (int i = 0; i < 3; i++) {
                     System. out .println("i = " + i);
                     for (int j = 0; j < 100; j++) {
                           if (j == 8)
                                 break signal1;
                           System. out .print(" j = " + j);
                     }
                     sig = true ;
                     System. out .println("In signal 1" );
               }
               System. out .println("out Loops " );
               if (sig == true) {
                     System. out .println("外层循环未被break" );
               } else
                     System. out .println("所有循环break" );
   }
break 标签；break 跳出制定块，可以是任何块｛｝，但是块内必须包含break 标签；