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我目前有一個三角形類與我所有的計算。如何在另一個類中的測試類中使用JOptionPane輸入?
public class Triangle
{
private double x1;
private double y1;
private double x2;
private double y2;
private double x3;
private double y3;
private double lengthA;
private double lengthB;
private double lengthC;
private double angleA;
private double angleB;
private double angleC;
private double perimeter;
private double height;
private double area;
public double calcArea()
{
area = .5 * lengthC * height;
return area;
}
public double calcPerimeter()
{
perimeter = lengthA + lengthB + lengthC;
return perimeter;
}
public double lengthA()
{
lengthA = Math.sqrt(Math.pow((x2 - x3),2) + Math.pow(height,2));
return lengthA;
}
public double lengthB()
{
lengthB = Math.sqrt(Math.pow((x3 - x1),2) + Math.pow(height,2));
return lengthB;
}
public double lengthC()
{
lengthC = x2 - x1;
return lengthC;
}
public double getHeight()
{
height = y3 - y1;
return height;
}
public double angleA()
{
angleA = Math.abs(Math.toDegrees(Math.asin(height/lengthB)));
return angleA;
}
public double angleB()
{
angleB = Math.abs(Math.toDegrees(Math.asin(height/lengthA)));
return angleB;
}
public double angleC()
{
angleC = 180 - angleA - angleB;
return angleC;
}
}
我也有一個TriangleTester類,它使用JOptionPane來獲取三角形的座標。
import javax.swing.*;
public class TriangleTester
{
public static void main (String [] args)
{
double x1;
double y1;
double x2;
double y2;
double x3;
double y3;
String v1;
String v2;
String v3;
String v4;
String v5;
String v6;
v1 = JOptionPane.showInputDialog("Enter x1 for point A");
v2 = JOptionPane.showInputDialog("Enter y1 for point A");
v3 = JOptionPane.showInputDialog("Enter x2 for point B");
v4 = JOptionPane.showInputDialog("Enter y2 for point B");
v5 = JOptionPane.showInputDialog("Enter x3 for point C");
v6 = JOptionPane.showInputDialog("Enter y3 for point C");
x1 = Integer.parseInt(v1);
y1 = Integer.parseInt(v2);
x2 = Integer.parseInt(v3);
y2 = Integer.parseInt(v4);
x3 = Integer.parseInt(v5);
y3 = Integer.parseInt(v6);
Triangle tri = new Triangle();
double lengthA = tri.lengthA();
double lengthB = tri.lengthB();
double lengthC = tri.lengthC();
double angleA = tri.angleA();
double angleB = tri.angleB();
double angleC = tri.angleC();
double perimeter = tri.calcPerimeter();
double height = tri.getHeight();
double area = tri.calcArea();
System.out.printf("Set up triangle with coordinates (" + x1 + "," + y1 + "), (" + x2 + "," + y2 + "), (" + x3 + "," + y3 + ")");
System.out.printf("\nArea:\t\t\t\t" + area);
System.out.printf("\nPerimeter:\t\t" + perimeter);
System.out.printf("\nLength side a:\t" + lengthA);
System.out.printf("\nLength side b:\t" + lengthB);
System.out.printf("\nLength side c:\t" + lengthC);
System.out.printf("\nHeight h:\t\t" + height);
System.out.printf("\nAngle A:\t\t\t" + angleA);
System.out.printf("\nAngle B:\t\t\t" + angleB);
System.out.printf("\nAngle C:\t\t\t" + angleC);
}
}
當我運行測試代碼,它打印用正確的x和y值的座標,但一切結束了打印爲0。我相信這是因爲我還沒有作出x和之間的任何連接Triangle類和TriangleTester類的y值。我如何才能讓Triangle類使用TriangleTester類中輸入的x和y值來計算答案?謝謝。
是否使用該包裝的IDE類 主程序之間的setter方法? –
我沒有得到角度B,C計算工作,但其餘完成 –