線程不執行

我是新來的java，所以我想這是一個簡單的問題。在我的事件監聽器中，我有一個聲明變量的方法，我試圖在同一事件中使用這些變量。雖然它不起作用，但代碼如下：線程不執行

import javax.swing.*; 
import java.awt.*; 
import java.awt.event.*; 

public class GUI extends Frame implements WindowListener,ActionListener { 
cpWindow window1 = new cpWindow(); 
cmWindow window2 = new cmWindow(); 
SolarSystem system = new SolarSystem(300,300); 
Planet Planetarium; 
/** 
* Frame for general window. 
*/ 
public void createFrame0(){ 
JFrame f0 = new JFrame("Choose what you want to do"); 
f0.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
f0.addWindowListener(this); 
f0.setLayout(new GridLayout(3,1)); 
JButton cP = new JButton("Create a planet"); 
JButton cM = new JButton("Create a moon"); 
JButton Delete = new JButton("Delete a planet or moon"); 
f0.add(cP); 
f0.add(cM); 
f0.add(Delete); 
cP.addActionListener(this); 
cM.addActionListener(this); 
Delete.addActionListener(this); 
cP.setActionCommand("1"); 
cM.setActionCommand("2"); 
Delete.setActionCommand("3"); 
f0.pack(); 
f0.setVisible(true); 
} 
/** 
    * Frame for planet adding window. 
    */ 
class cpWindow implements ActionListener,WindowListener{ 
JLabel name1 = new JLabel("Name"); 
JLabel color1 = new JLabel("Color"); 
JLabel diam1 = new JLabel("Diameter"); 
JLabel dist1 = new JLabel("Distance"); 
JLabel speed1 = new JLabel("Speed"); 
JTextField name2 = new JTextField(); 
JTextField color2 = new JTextField(); 
JTextField diam2 = new JTextField(); 
JTextField dist2 = new JTextField(); 
JTextField speed2 = new JTextField(); 
double distance; 
int Speed; 
double diameter; 

public void createFrame1() { 
    JFrame f1 = new JFrame("Add planet"); 
    f1.addWindowListener(this); 
    f1.setLayout(new GridLayout(6,2,5,5)); 
    JButton mygt = new JButton("Create planet"); 
    mygt.addActionListener(this); 
     name2.setText("belekoks");color2.setText("RED");diam2.setText("30");dist2.setText("60");spe ed2.setText("2"); 
    f1.add(name1);f1.add(name2);f1.add(color1);f1.add(color2);f1.add(diam1); 
    f1.add(diam2);f1.add(dist1);f1.add(dist2);f1.add(speed1);f1.add(speed2); 
    f1.add(mygt); 
    f1.pack(); 
    f1.setVisible(true); 
} 
public void createVariables(){ 
    try { 
      distance = Double.parseDouble(dist2.getText()); 
      Speed = Integer.parseInt(speed2.getText()); 
      diameter = Double.parseDouble(diam2.getText()); 
     } 
     catch(NumberFormatException i) { 
     } 
     Main.diametras = diameter; 
     Main.distancija = distance; 
     Main.greitis = Speed; 
     Main.vardas = name2.getText(); 
     Main.spalva = color2.getText(); 
     Planetarium = new    Planet(Main.vardas,Main.distancija,Main.diametras,Main.spalva,Main.greitis); 
    } 

public void actionPerformed(ActionEvent e) { 
    createVariables(); 
    new NewThread().run(); 
} 


public void windowClosing(WindowEvent e) { 
    dispose(); 
    System.exit(0); 
} 
public void windowClosed(WindowEvent e) {} 
public void windowActivated(WindowEvent arg0) {} 
public void windowDeactivated(WindowEvent arg0) {} 
public void windowDeiconified(WindowEvent arg0) {} 
public void windowIconified(WindowEvent arg0) {} 
public void windowOpened(WindowEvent arg0) {} 
} 
/** 
* Frame for moon adding window 
*/ 
class cmWindow implements ActionListener,WindowListener{ 
JLabel name1 = new JLabel("Name"); 
JLabel color1 = new JLabel("Color"); 
JLabel diam1 = new JLabel("Diameter"); 
JLabel dist1 = new JLabel("Distance"); 
JLabel speed1 = new JLabel("Speed"); 
JLabel corDist1 = new JLabel("Distance from centre of rotation"); 
JLabel corSpeed1 = new JLabel("Speed which moon centres"); 
JTextField name2 = new JTextField(); 
JTextField color2 = new JTextField(); 
JTextField diam2 = new JTextField(); 
JTextField dist2 = new JTextField(); 
JTextField speed2 = new JTextField(); 
JTextField corDist2 = new JTextField(); 
JTextField corSpeed2 = new JTextField(); 

double distance; 
int Speed; 
double diameter; 
int cordistance; 
int corspeed; 

public void createFrame1() { 
    JFrame f1 = new JFrame("Add moon"); 
    f1.addWindowListener(this); 
    f1.setLayout(new GridLayout(8,2,5,5)); 
    JButton mygt = new JButton("Create moon"); 
    mygt.addActionListener(this); 
     name2.setText("Belekoks");color2.setText("BLUE");diam2.setText("15");dist2.setText("60");sp eed2.setText("2");corDist2.setText("15");corSpeed2.setText("3"); 
    f1.add(name1);f1.add(name2);f1.add(color1);f1.add(color2);f1.add(diam1); 
    f1.add(diam2);f1.add(dist1);f1.add(dist2);f1.add(speed1);f1.add(speed2); 
    f1.add(corDist1);f1.add(corDist2);f1.add(corSpeed1);f1.add(corSpeed2); 
    f1.add(mygt); 
    f1.pack(); 
    f1.setVisible(true); 
} 
public void createVariables(){ 
    try { 
      distance = Double.parseDouble(dist2.getText()); 
      Speed = Integer.parseInt(speed2.getText()); 
      diameter = Double.parseDouble(diam2.getText()); 
      cordistance = Integer.parseInt(corDist2.getText()); 
      corspeed = Integer.parseInt(corSpeed2.getText()); 
     } 
     catch(NumberFormatException i) {} 
    /* Main.diametras = diameter; 
     Main.distancija = distance; 
     Main.greitis = Speed; 
     Main.vardas = name2.getText(); 
     Main.spalva = color2.getText(); 
*/  Main.centGrt = corspeed; 
     Main.centAts = cordistance; 
} 
public void actionPerformed(ActionEvent e) { 
    createVariables(); 
} 
public void windowClosing(WindowEvent e) { 
    dispose(); 
    System.exit(0); 
} 
public void windowClosed(WindowEvent e) {} 
public void windowActivated(WindowEvent arg0) {} 
public void windowDeactivated(WindowEvent arg0) {} 
public void windowDeiconified(WindowEvent arg0) {} 
public void windowIconified(WindowEvent arg0) {} 
public void windowOpened(WindowEvent arg0) {} 
} 
/** 
* Deleting window 
*/ 
class DelWindow implements ActionListener,WindowListener{ 



public void actionPerformed(ActionEvent e) { 

} 
public void windowClosing(WindowEvent e) { 
    dispose(); 
    System.exit(0); 
} 
public void windowClosed(WindowEvent e) {} 
public void windowActivated(WindowEvent arg0) {} 
public void windowDeactivated(WindowEvent arg0) {} 
public void windowDeiconified(WindowEvent arg0) {} 
public void windowIconified(WindowEvent arg0) {} 
public void windowOpened(WindowEvent arg0) {} 
} 
//////////////////////////////////////////////////////// 
public GUI() { 
createFrame0(); 
} 


public void actionPerformed(ActionEvent e) { 
if ("1".equals(e.getActionCommand())) {this.window1.createFrame1();} 
else if ("2".equals(e.getActionCommand())) {this.window2.createFrame1();} 
// else if ("3".equals(e.getActionCommand())) {this.window2.createFrame1();} 
} 

public void windowClosing(WindowEvent e) { 
dispose(); 
System.exit(0); 
} 
public void windowClosed(WindowEvent e) {} 
public void windowActivated(WindowEvent arg0) {} 
public void windowDeactivated(WindowEvent arg0) {} 
public void windowDeiconified(WindowEvent arg0) {} 
public void windowIconified(WindowEvent arg0) {} 
public void windowOpened(WindowEvent arg0) {} 

//Create a new thread. 
class NewThread implements Runnable { 
Thread t; 
NewThread() { 
    // Create a new, second thread 
    t = new Thread(this); 
    t.start(); // Start the thread 
} 
// This is the entry point for the second thread. 
public void run() { 
    Planet planet = new Planet(Main.vardas,Main.distancija,Main.diametras,Main.spalva,Main.greitis); 
    try { 
     for(int i = 0; i >= 0; i++) { 
      planet.move(); 
      planet.drawOn(system); 
      system.finishedDrawing(); 
     } 
    } catch (Exception e) {} 
} 
} 

}

有什麼想法嗎？

來源

2011-02-23 Medardas

您是否可以把它歸結爲一個較小的測試用例，這是很多代碼需要通過的。 –

什麼不行？ – AlexR

現在它進入無限循環，並使按鈕和幀非活動 – Medardas

一個需要實際啓動線程，只是實例化一個線程對象是不夠的。

public void actionPerformed(ActionEvent e) { 
    createVariables(); 
    new NewThread().start(); 
}

來源

2011-02-23 11:08:18

超級，謝謝，你幾乎是正確的，但忘了提醒我，我需要擴展線程，而不是實現可運行=] – Medardas

當你創建一個Thread與new Thread()，你必須通過包含要在線程中執行的實際代碼的Runnable一個實例。

所以你的NewThread構造應該像

NewThread() { 
    // Create a new, second thread 
    t = new Thread(this); 
    t.start(); // Start the thread 
}

這將創建一個執行NewThread#run()的代碼，我的猜測是，你想要什麼的線程。

在做這件事之前，一定要完成NewThread中所有字段的初始化。

來源

2011-02-23 11:15:03

回答

相關問題