在Java中将整个代码从while循环转换为For循环

我曾尝试将代码从while循环转换为For循环，但我没有得到所需的输出

For循环代码为：

public static void diamond1() {
        System.out.println("Diamond Height: " + DIAMOND_SIZE);
        System.out.println("Output for: For Loop");

        int noOfRows = DIAMOND_SIZE;
        int md=noOfRows%2;


        //Getting midRow of the diamond
        int midRow = (noOfRows)/2;

        //Printing upper half of the diamond
        for (int i = noOfRows; i >= 0;i=(i-2))
        {
            //Printing i spaces at the beginning of each row
            for (int j = 1; j <= i-md; j++) {
                System.out.print(" ");
            }
            //Printing j *'s at the end of each row
            for (int j = 1; j <= (noOfRows+1-md); j++) {
                if (i-md==0 && j==midRow+1) {
                    System.out.print("o ");
                }
                else {
                    System.out.print("* ");
                }
            }
            System.out.println();
        }

        //Printing lower half of the diamond
        for (int i = 2; i <= noOfRows;i=(i+2)) {
            //Printing i spaces at the beginning of each row
            for (int j = 1; j <= i; j++) {
                System.out.print(" ");
            }

            //Printing j *'s at the end of each row
            for (int j=0; j <= (noOfRows); j++) {
                System.out.print("* ");
            }

            System.out.println();
        }
    }

需要的输出是：

  * 
* o * 
  *

我最初的while循环是：

public static void diamond2() {

            System.out.println("");
            System.out.println("Output for: While loop");

    int noOfRows = DIAMOND_SIZE;
    int md=noOfRows%2;

    //Getting midRow of the diamond
    int midRow = (noOfRows)/2;
    int i = noOfRows;
    while(i >= 0){
        //Printing i spaces at the beginning of each row
        int j = 1;
        while(j <= i-md){
            if(i-md==0)break;
            System.out.print(" ");
            j++;
        }

        //Printing j *'s at the end of each row
        while(j <= (noOfRows+1-md)){
            if (i-md==0 && j==midRow+1) {
                System.out.print("o ");
            }
            else {
              System.out.print("* ");  
            }
            j++;
        }
        System.out.println();
        i=(i-2);
    }

    i = 2;
    while(i <= noOfRows){
    //Printing i spaces at the beginning of each row
        int j = 1;
        while(j <= i){
            System.out.print(" ");
            j++;
        }

        //Printing j *'s at the end of each row
        while(j <= (noOfRows+1-md)){

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

        }
                 System.out.println();
                 i=(i+2);
        }

    }

publicstaticvoiddiamond2（）{
System.out.println（“”）；
System.out.println（“While循环的输出”）；
int noOfRows=钻石大小；
int md=noOfRows%2；
//得到钻石的中排
int midRow=（noOfRows）/2；
int i=无窗；
而（i>=0）{
//打印每行开头的空格
int j=1；
（j而不是比较循环，你应该在调试时关注代码出错的地方。这可以帮助你确定问题所在，然后你可以与原始代码进行比较

对我来说，快速查看下菱形中的最后一个while循环表明您有以下内容

 //Printing j *'s at the end of each row
        while(j <= (noOfRows+1-md)){

//在每行末尾打印j*
虽然（j当您在while循环中使用
j
时，您将其用作原始while循环的变量。在for循环中，您在嵌套for循环中使用
j
，这会使
j
计数减少。要修复此问题，请添加一个全局int变量，并在顶部菱形循环的末尾向其值添加2。在底部循环在第一个嵌套循环的末尾将其设置为
j
+1。下面是for循环的完成代码的外观：

int count = 0;
//Printing upper half of the diamond
for (int i = noOfRows; i >= 0; i-=2) {
    //Printing i spaces at the beginning of each row
    for (int j = 1; j <= i-md; j++) {
        if(i-md==0) {
            break;
        }
        System.out.print(" ");
    }
    //Printing j *'s at the end of each row
    for (int j = noOfRows - count; j <= (noOfRows+1-md); j++) {
        if (i-md==0 && j==midRow+1) {
            System.out.print("o ");
        }
        else {
           System.out.print("* ");
        }
    }
    System.out.println();
    count += 2;
}

//Printing lower half of the diamond
count = 0;
for (int i = 2; i <= noOfRows; i+=2) {
    //Printing i spaces at the beginning of each row
    for (int j = 1; j <= i; j++) {
        System.out.print(" ");
        count = j+1;
    }
    //Printing j *'s at the end of each row
    for (int j = count; j <= (noOfRows); j++) {
        System.out.print("* ");
    }
    System.out.println();
}

int count=0；
//打印钻石的上半部分
对于（int i=noOfRows；i>=0；i-=2）{
//打印每行开头的空格
for（int j=1；j我认为仅仅将while循环更改为for循环并不是我们想要的。无论如何，有一种直接的方法可以实现您想要的

Java中的for循环有三个部分：


初始值
每次迭代前的条件
每次迭代后的操作

我们使用它在三个步骤中将
while
转换为
for

在第一步中，将所有
while
循环替换为只填充条件的
for
循环。例如，
for（；j）调试器将在这里帮助您。@AndyTurner我知道这听起来可能很傻，但我如何调试它？您最初使用的while循环是什么？@donk2017 Use System.out.println（）例如，检查您正在使用的IDE的教程。@DaveK。我已经编辑了OP以包含原始的while循环。我也尝试过调试，但无法找出哪里出了问题。
//Printing j *'s at the end of each row
            for (int j=0; j <= (noOfRows); j++) {

int count = 0;
//Printing upper half of the diamond
for (int i = noOfRows; i >= 0; i-=2) {
    //Printing i spaces at the beginning of each row
    for (int j = 1; j <= i-md; j++) {
        if(i-md==0) {
            break;
        }
        System.out.print(" ");
    }
    //Printing j *'s at the end of each row
    for (int j = noOfRows - count; j <= (noOfRows+1-md); j++) {
        if (i-md==0 && j==midRow+1) {
            System.out.print("o ");
        }
        else {
           System.out.print("* ");
        }
    }
    System.out.println();
    count += 2;
}

//Printing lower half of the diamond
count = 0;
for (int i = 2; i <= noOfRows; i+=2) {
    //Printing i spaces at the beginning of each row
    for (int j = 1; j <= i; j++) {
        System.out.print(" ");
        count = j+1;
    }
    //Printing j *'s at the end of each row
    for (int j = count; j <= (noOfRows); j++) {
        System.out.print("* ");
    }
    System.out.println();
}

public static void diamond2() {

    System.out.println("Solved by Stackoverflow.com. Have fun with it.");
    System.out.println("Output for: For loops");

    int noOfRows = DIAMOND_SIZE;
    int md = noOfRows % 2;

    // Getting midRow of the diamond
    int midRow = (noOfRows) / 2;
    int i = noOfRows;
    for (; i >= 0; i = (i - 2)) {
        // Printing i spaces at the beginning of each row
        int j = 1;
        for (; j <= i - md; j++) {
            if (i - md == 0)
                break;
            System.out.print(" ");
        }

        // Printing j *'s at the end of each row
        for (; j <= (noOfRows + 1 - md); j++) {
            if (i - md == 0 && j == midRow + 1) {
                System.out.print("o ");
            } else {
                System.out.print("* ");
            }
        }
        System.out.println();
    }

    for (i = 2; i <= noOfRows; i = (i + 2)) {
        // Printing i spaces at the beginning of each row
        int j = 1;
        for (; j <= i; j++) {
            System.out.print(" ");
        }
        // Printing j *'s at the end of each row
        for (; j <= (noOfRows + 1 - md); j++) {
            System.out.print("* ");
            j++;
        }
        System.out.println();
    }

}