如何在java中打破while循环？

理想情况下，我希望它在计数器为4时停止，不要继续执行“2和3，大小为3”

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非常感谢

您需要为循环使用标签。请尝试以下代码段：

1 and 2 and size is 4  
Counter is 2  
1 and 3 and size is 4  
Counter is 3  
1 and 4 and size is 4  
Counter is 4  
here 4  
2 and 3 and size is 3  
Counter is 5  
3 and 4 and size is 2  
Counter is 6  
here 6  

//设置虚拟数组
ArrayList=dateArray；
int计数器=1；
户外山顶：
while（list.size（）！=0）{
对于（int j=1；j

您需要为循环使用标签。请尝试以下代码段：

1 and 2 and size is 4  
Counter is 2  
1 and 3 and size is 4  
Counter is 3  
1 and 4 and size is 4  
Counter is 4  
here 4  
2 and 3 and size is 3  
Counter is 5  
3 and 4 and size is 2  
Counter is 6  
here 6  

//设置虚拟数组
ArrayList=dateArray；
int计数器=1；
户外山顶：
while（list.size（）！=0）{
对于（int j=1；j

您可以添加如下布尔变量：

// Setup dummy array
    ArrayList<Integer> list = dateArray;
    int counter = 1;
outerwhileloop:
    while (list.size() != 0) {
        for (int j = 1; j < list.size(); j++)
        {

            //System.out.println(list.get(0) + " and " + list.get(j));
            int difference = list.get(0) - list.get(j);
            if (difference <6){
                System.out.println(list.get(0) + " and " + list.get(j) + " and size is " +list.size() );    
                counter= counter +1;
                System.out.println ("Counter is " + counter);
                if (counter >= 4){
                    System.out.println ("j = " + j + " Counter =" + counter);   
                    if (j ==list.size()-1) {
                        System.out.println ("here " + counter); 
                        break outerwhileloop;
                    }   
                }
            }
        }
        list.remove(0);
    };      

//设置虚拟数组
ArrayList=dateArray；
int计数器=1；
布尔值isBreak=false；
while（list.size（）！=0&&！isBreak）{
对于（int j=1；j

您可以添加如下布尔变量：

// Setup dummy array
    ArrayList<Integer> list = dateArray;
    int counter = 1;
outerwhileloop:
    while (list.size() != 0) {
        for (int j = 1; j < list.size(); j++)
        {

            //System.out.println(list.get(0) + " and " + list.get(j));
            int difference = list.get(0) - list.get(j);
            if (difference <6){
                System.out.println(list.get(0) + " and " + list.get(j) + " and size is " +list.size() );    
                counter= counter +1;
                System.out.println ("Counter is " + counter);
                if (counter >= 4){
                    System.out.println ("j = " + j + " Counter =" + counter);   
                    if (j ==list.size()-1) {
                        System.out.println ("here " + counter); 
                        break outerwhileloop;
                    }   
                }
            }
        }
        list.remove(0);
    };      

//设置虚拟数组
ArrayList=dateArray；
int计数器=1；
布尔值isBreak=false；
while（list.size（）！=0&&！isBreak）{
对于（int j=1；j

只需将代码移动到方法并调用return。或者，你可以用一种叫做

搜索：
对于（i=0；i

只需将代码移动到方法并调用return。或者，你可以用一种叫做

搜索：
对于（i=0；i

您可以使用java标签：

search:
    for (i = 0; i < arrayOfInts.length; i++) {
        for (j = 0; j < arrayOfInts[i].length;
             j++) {
            if (arrayOfInts[i][j] == searchfor) {
                foundIt = true;
                break search;
            }
        }
    }

带标签的输出：

Number: 1 and fact: 1
Number: 2 and fact: 3
Number: 3 and fact: 6
Number: 4 and fact: 10
Number: 5 and fact: 15
Number: 6 and fact: 21
Number: 7 and fact: 28
Number: 8 and fact: 36
Number: 9 and fact: 45

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您可以将java标签用于以下用途：

search:
    for (i = 0; i < arrayOfInts.length; i++) {
        for (j = 0; j < arrayOfInts[i].length;
             j++) {
            if (arrayOfInts[i][j] == searchfor) {
                foundIt = true;
                break search;
            }
        }
    }

带标签的输出：

Number: 1 and fact: 1
Number: 2 and fact: 3
Number: 3 and fact: 6
Number: 4 and fact: 10
Number: 5 and fact: 15
Number: 6 and fact: 21
Number: 7 and fact: 28
Number: 8 and fact: 36
Number: 9 and fact: 45

---

只需删除

while

循环，只需执行一次

for

循环。如果列表大小不是4，您能否澄清应该发生什么？您可以使用两个

break

语句。首先，只需将您从中带出，第二个将在时将您从中带出。当然，如果通过达到条件来终止

while

循环会更好。只需删除

while

循环，只需执行一次

for

循环。如果列表大小不是4，您能否澄清应该发生什么？您可以使用两个

break

语句。首先，只需将您从中带出，第二个将在时将您从中带出。当然，如果您在到达条件时终止

，而

循环会更好。