我有四个 foreach 循环,它们遍历集合并根据条件执行某些操作。
这是我现在正在编写的代码:
boolean breakFlag = false;
String valueFromObj2 = null;
String valueFromObj4 = null;
for(Object1 object1: objects){
for(Object2 object2: object1){
// I get some value from object2
valueFromObj2 = object2.getSomeValue();
for(Object3 object3 : object2){
for(Object4 object4: object3){
// Finally I get some value from Object4.
valueFromObj4 = object4.getSomeValue();
// Compare with valueFromObj2 to decide either to break all the foreach loop
breakFlag = compareTwoVariable(valueFromObj2, valueFromObj4 );
if(breakFlag){break;}
} // fourth loop ends here
if(breakFlag){break;}
} // third loop ends here
if(breakFlag){break;}
} // second loop ends here
if(breakFlag){break;}
} // first loop ends here
主要对象(代码中的对象)来自第三方提供商 SDK,因此我无法更改该部分的任何内容。我想询问 Stack Overflow 社区是否有更好的方法来打破所有四个 foreach 循环。或者是否有其他方法可以重构此代码以使其更具可读性和可维护性。
在最外层循环上使用标签,并将该标签包含在break
当你想跳出所有循环时声明。在下面的示例中,我修改了您的代码以使用标签OUTERMOST
:
String valueFromObj2 = null;
String valueFromObj4 = null;
OUTERMOST: for(Object1 object1: objects){
for(Object2 object2: object1){
//I get some value from object2
valueFromObj2 = object2.getSomeValue();
for(Object3 object3 : object2){
for(Object4 object4: object3){
//Finally I get some value from Object4.
valueFromObj4 = object4.getSomeValue();
//Compare with valueFromObj2 to decide either to break all the foreach loop
if( compareTwoVariable(valueFromObj2, valueFromObj4 )) {
break OUTERMOST;
}
}//fourth loop ends here
}//third loop ends here
}//second loop ends here
}//first loop ends here
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