java - 对齐数字时遇到问题

Question

如果这样的问题的答案已经存在，我深表歉意，我是一个非常新手的编码员，我可能无法找到它。

我正在开发一个项目，根据三个点的 x 和 y 值给出距离、周长和面积。使用 printf 命令，应该将这些点四舍五入到千分位。

它应该看起来像这样:

三角形={(8.500 ,1.250) ,(2.500 ,1.250) ,(2.500 ,9.250)}

然而，我只能设法得到:

三角形 = { ( 8.5001.2502.5001.2502.5009.250

这是我的代码:

public class TriangleCalculator 
{

public static void main(String[] args) 
{
  System.out.println("Enter the x- and y- coordinates of the first point");
  Scanner keyBoard = new Scanner (System.in);
    double pointOneX = keyBoard.nextDouble();
    double pointOneY = keyBoard.nextDouble();
          System.out.println("Enter the x- and y- coordinates of the second point");
    double pointTwoX = keyBoard.nextDouble();
    double pointTwoY = keyBoard.nextDouble();
  System.out.println("Enter the x- and y- coordinates of the third point");
    double pointThreeX = keyBoard.nextDouble();
    double pointThreeY = keyBoard.nextDouble();

  System.out.printf("Triangle = { ( %.3f", pointOneX);
  System.out.printf("%.3f", pointOneY);
  System.out.printf("%.3f", pointTwoX);
  System.out.printf("%.3f", pointTwoY);
  System.out.printf("%.3f", pointThreeX);
  System.out.printf("%.3f", pointThreeY);
 }

}

如果有人可以告诉或展示如何正确编写 printf 语句或如何正确对齐我的代码，我将不胜感激。

Answer 1

您的代码不会自行添加括号。

尝试:

System.out.printf("%.3f", pointOneY);
System.out.printf("),(");
System.out.printf("%.3f", pointTwoX);
System.out.printf("%.3f", pointTwoY);
System.out.printf("),(");    
System.out.printf("%.3f", pointThreeX);
System.out.printf("%.3f", pointThreeY);
System.out.printf(")}");