编译环境：
操作系统：Win8.1 64位
IDE平台：Visual Studio 2013 Ultimate
一、原理
二、代码实现
角度后方交会.java
package text;
import java.awt.*;
import java.awt.event.*;
import java.math.*;
import javax.swing.*;
import javax.swing.border.Border;
public class 角度后方交会 extends JFrame
{
public static final int TEXTAREA_ROWS = 20;
public static final int TEXTAREA_COLUMNS = 40;
public 角度后方交会()
{
final JTextField A_X = new JTextField("37477");
final JTextField A_Y = new JTextField("16307");
final JTextField B_X = new JTextField("37327");
final JTextField B_Y = new JTextField("16078");
final JTextField C_X = new JTextField("37163");
final JTextField C_Y = new JTextField("16046");
final JTextField α_1 = new JTextField("40°41'");
final JTextField β_1 = new JTextField("75°19'");
final JTextField γ_1 = new JTextField("58°11'");
final JTextField R_A = new JTextField("200");
final JTextField R_B = new JTextField("200");
final JTextField R_C = new JTextField("200");
JPanel northPanel = new JPanel();
JPanel WestPanel = new JPanel();
JLabel pic= new JLabel();
pic.setIcon(new ImageIcon("G:/workplace/角度后方交会/3.png"));
WestPanel.add(pic);
getContentPane().add(WestPanel, BorderLayout.WEST);
//角度前方交会
northPanel.setLayout(new GridLayout(2, 6));
northPanel.add(new JLabel("A_X: ", SwingConstants.CENTER));
northPanel.add(A_X);
northPanel.add(new JLabel("A_Y: ", SwingConstants.CENTER));
northPanel.add(A_Y);
northPanel.add(new JLabel("B_X: ", SwingConstants.CENTER));
northPanel.add(B_X);
northPanel.add(new JLabel("B_Y: ", SwingConstants.CENTER));
northPanel.add(B_Y);
northPanel.add(new JLabel("C_X: ", SwingConstants.CENTER));
northPanel.add(C_X);
northPanel.add(new JLabel("C_Y: ", SwingConstants.CENTER));
northPanel.add(C_Y);
northPanel.add(new JLabel("α: ", SwingConstants.CENTER));
northPanel.add(α_1);
northPanel.add(new JLabel("β: ", SwingConstants.CENTER));
northPanel.add(β_1);
northPanel.add(new JLabel("γ: ", SwingConstants.CENTER));
northPanel.add(γ_1);
northPanel.add(new JLabel("RA: ", SwingConstants.CENTER));
northPanel.add(R_A);
northPanel.add(new JLabel("RB: ", SwingConstants.CENTER));
northPanel.add(R_B);
northPanel.add(new JLabel("RC: ", SwingConstants.CENTER));
northPanel.add(R_C);
Border etched = BorderFactory.createEtchedBorder();
Border titled = BorderFactory.createTitledBorder(etched, "角度后方交会");
northPanel.setBorder(titled);
getContentPane().add(northPanel, BorderLayout.NORTH);
final JTextArea textArea = new JTextArea(20,40);
JScrollPane scrollPane = new JScrollPane(textArea);
getContentPane().add(scrollPane, BorderLayout.CENTER);
// add button to append text into the text area
JPanel southPanel = new JPanel();
JButton insertButton = new JButton("计算P点坐标");
insertButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
//坐标初始化
Double X1=Double.valueOf(A_X.getText()).doubleValue();
Double Y1=Double.valueOf(A_Y.getText()).doubleValue();
Double X2=Double.valueOf(B_X.getText()).doubleValue();
Double Y2=Double.valueOf(B_Y.getText()).doubleValue();
Double X3=Double.valueOf(C_X.getText()).doubleValue();
Double Y3=Double.valueOf(C_Y.getText()).doubleValue();
Double α=convert(α_1.getText());
Double β=convert(β_1.getText());
Double γ=convert(γ_1.getText());
Double RA=Double.valueOf(R_A.getText()).doubleValue();
Double RB=Double.valueOf(R_B.getText()).doubleValue();
Double RC=Double.valueOf(R_C.getText()).doubleValue();
//A、B、P
Double D_AB=Math.sqrt( Math.pow((X1-X2),2)+Math.pow((Y1-Y2),2));
Double α_AB=Math.atan(Math.abs(Y1-Y2)/Math.abs(X1-X2));
Double α_21=Math.asin(RA*Math.sin(α)/D_AB);
Double α_11=α_AB-α_21;
Double XP1=X3+RC*Math.cos(α_11);
Double YP1=Y3+RC*Math.sin(α_11);
//B、C、P
Double D_BC=Math.sqrt( Math.pow((X3-X2),2)+Math.pow((Y3-Y2),2));
Double α_BC=Math.atan(Math.abs(Y2-Y3)/Math.abs(X2-X3));
Double α_22=Math.asin(RB*Math.sin(α)/D_BC);
Double α_12=α_BC-α_22;
Double XP2=X3+RC*Math.cos(α_12);
Double YP2=Y3+RC*Math.sin(α_12);
textArea.append("=====角度后方交会===="+"\n"+"参考值1:"+ "( " +XP1+","+YP1+")"
+ "\n"+"参考值2:"+"( " +XP2+","+YP2+")"
+ "\n"+"误差距离约:"+Math.round(miss(XP1,YP1,XP2,YP2))+"米");
}
public double miss(double XP1,double YP1,double XP2,double YP2){
return Math.sqrt(Math.pow((XP1-XP2),2)+Math.pow((YP1-YP2),2));
}
public double convert(String input){
Double a=Double.valueOf(input.split("°")[0]).doubleValue();
Double b=Double.valueOf(input.split("°")[1].split("'")[0]).doubleValue();
return a+b/60;
}
});
add(insertButton, BorderLayout.SOUTH);
pack();
}
}
Test.java
package text;
import java.awt.*;
import javax.swing.*;
public class Test
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new 角度后方交会();
frame.setTitle("角度后方交会");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
三、运行结果
原文地址：http://blog.csdn.net/cooelf/article/details/40627407
