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在java中,要想跳出多重循环,可以在外面的循环语句前定义一个标号(标号位于语句之前,标号只能被continue和break引用),然后再里层循环体的代码中使用带有标号的break语句,跳出循环:
here: for (int i = 1; i <= 4; i++) { a1 = "外层循环第"+i+"层"; for (int j = 1; j <= 4; j++) { b1 = "内层循环第"+j+"层"; if (2 == j & 2 == i) { break here; } } }
使外层的循环条件受到内层代码的控制:
Boolean state = true; for (int i = 1; i <= 4 && state; i++) { a2 = "外层循环第"+i+"层"; for (int j = 1; j <= 4 && state; j++) { b2 = "内层循环第"+j+"层"; if (2 == j & 2 == i) { state = false; } } }
使用try/catch强制跳出循环:
try { for (int i = 1; i <= 3; i++) { a3 = "外层循环第"+i+"层"; for (int j = 1; j <= 3; j++) { b3 = "内层循环第"+j+"层"; if (2 == j & 2 == i) { throw new Exception(); } } } } catch (Exception e) { System.out.println(a3+b3); }
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