Java 如何用while循环替换for循环方法

我是编程新手，并尝试学习java。我试图用while循环替换此方法中的for循环。有人能帮我怎么做吗？因为我写的代码不正确

这是原创的

public static int doSomething(int [] a, int x) {
    for (int i = 0; i < a.length; ++i)
        if (a[i]<=x) return i;

    return -1;
}

公共静态int doSomething（int[]a，int x）{
对于（int i=0；iif（a[i]仅此部分：
if（a[i]在
if
和
while
之后使用括号。这是一种很好的做法

public static int doSomething(int [] a, int x) {
    i=0;
    while (i < a.length){
        if(a[i] <=x){ 
           return i; 
        }
        i++;    
    }
    return -1;
}

公共静态int doSomething（int[]a，int x）{
i=0；
while（iif（a[i]您的i++是不可访问的，因为它位于return语句后面。您可能希望将其移出if情况

i=0;

while (i < a.length){
    if(a[i] <=x){ 
        return i;
        i++;  //from here 
        }
        i++   //to here
        /* this block is also not what you want, this block would be exectued every time
           a[i] <=x would be false, so probably most of the time. 
        else{
        return -1;     //you should move this frome here
        }
        */
    }

    return i;   //to here, and remove the return i; . If the while loop is done and hasen't returned 
                //with your first return statement, then it shouldn't return with i here either. 
                //It should return with the -1 from above
}

i=0；
while（iif（a[i]return语句之后的任何内容都是死代码

i=0;

while (i < a.length){
    if(a[i] <= x) { 
        return i;
        i++; // This is your mistake
    } else {
        return -1;
    }
}

return i;

i=0；
while（i如果[i]
i++
无法访问，因为您将它放在同一范围内的
return
语句下面。您混合了好代码和错误代码。此外，此示例甚至不会编译（缺少分号）。我建议保持格式可读性。
i=0;

while (i < a.length){
    if(a[i] <=x){ 
        return i;
        i++;  //from here 
        }
        i++   //to here
        /* this block is also not what you want, this block would be exectued every time
           a[i] <=x would be false, so probably most of the time. 
        else{
        return -1;     //you should move this frome here
        }
        */
    }

    return i;   //to here, and remove the return i; . If the while loop is done and hasen't returned 
                //with your first return statement, then it shouldn't return with i here either. 
                //It should return with the -1 from above
}

i=0;

while (i < a.length){
    if(a[i] <= x) { 
        return i;
        i++; // This is your mistake
    } else {
        return -1;
    }
}

return i;

i=0;
while (i < a.length){
    if(a[i] <= x) { 
        return i;
    }
    i++;
}
return -1;