在Java中Netbeans新窗口全黑嗎？

Question

我正在嘗試爲遊戲製作GUI。首先，我在jFrame中加載一個歡迎屏幕。他們輸入詳細信息，如果細節正確，它應該加載下一個不同類別的屏幕。它正確檢查細節並打開新窗口，但不顯示它，它只是黑色？我不確定它是我的電腦還是我的代碼？ 這是第二個窗口中的代碼：

import java.net.*; 
import java.io.*; 
import java.util.*; 

public class ClientGUI extends javax.swing.JFrame { 

/** 
* Creates new form ClientGUI 
*/ 
private BufferedWriter writer; 
public ClientGUI() { 
    /* 
    * Set the Nimbus look and feel 
    */ 
    //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> 
    /* 
    * If Nimbus (introduced in Java SE 6) is not available, stay with the 
    * default look and feel. For details see 
    * http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
    */ 
    try { 
     for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { 
      if ("Nimbus".equals(info.getName())) { 
       javax.swing.UIManager.setLookAndFeel(info.getClassName()); 
       break; 
      } 
     } 
    } catch (ClassNotFoundException ex) { 
     java.util.logging.Logger.getLogger(ClientGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (InstantiationException ex) { 
     java.util.logging.Logger.getLogger(ClientGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (IllegalAccessException ex) { 
     java.util.logging.Logger.getLogger(ClientGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } catch (javax.swing.UnsupportedLookAndFeelException ex) { 
     java.util.logging.Logger.getLogger(ClientGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); 
    } 
    //</editor-fold> 

    /* 
    * Create and display the form 
    */ 
    setVisible(true); 
    initComponents(); 
} 

/** 
* This method is called from within the constructor to initialise the form. 
* WARNING: Do NOT modify this code. The content of this method is always 
* regenerated by the Form Editor. 
*/ 
@SuppressWarnings("unchecked") 
// <editor-fold defaultstate="collapsed" desc="Generated Code"> 

    jButton1.setText("Move N"); 
    jButton1.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton1ActionPerformed(evt); 
     } 
    }); 

    jButton2.setText("Move E"); 
    jButton2.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton2ActionPerformed(evt); 
     } 
    }); 

    jButton3.setText("Move S"); 
    jButton3.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton3ActionPerformed(evt); 
     } 
    }); 

    jButton4.setText("Move W"); 
    jButton4.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton4ActionPerformed(evt); 
     } 
    }); 

    jButton5.setText("Pickup"); 
    jButton5.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton5ActionPerformed(evt); 
     } 
    }); 

    jButton6.setText("Quit"); 
    jButton6.addActionListener(new java.awt.event.ActionListener() { 
     public void actionPerformed(java.awt.event.ActionEvent evt) { 
      jButton6ActionPerformed(evt); 
     } 
    }); 



private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {           

    try{ 
     writer.write("Move N"); 
     writer.newLine(); 
     writer.flush(); 
    } 
    catch(Exception e){ 
      System.out.println("error"); 
    } 

}           

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {           
    try{ 
     writer.write("Move E"); 
     writer.newLine(); 
     writer.flush(); 
    } 
    catch(Exception e){ 
      System.out.println("error"); 
    } 
}           

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {           
    try{ 
     writer.write("Move S"); 
     writer.newLine(); 
     writer.flush(); 
    } 
    catch(Exception e){ 
      System.out.println("error"); 
    } 
}           

private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {           
    try{ 
     writer.write("Move W"); 
     writer.newLine(); 
     writer.flush(); 
    } 
    catch(Exception e){ 
      System.out.println("error"); 
    } 
}           

private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {           
    try{ 
     writer.write("PICKUP"); 
     writer.newLine(); 
     writer.flush(); 
    } 
    catch(Exception e){ 
      System.out.println("error"); 
    } 
}           

private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {           
    setVisible(false); 
}           

/** 
* @param args the command line arguments 
*/ 
public void run(){ 
try { 
     final Socket server = new Socket("localhost", 30000); 
    //Creates the socket to be used, has to be final because of innerclass 
    InputStream in = server.getInputStream(); 
    OutputStream out = server.getOutputStream(); 
    //Creates the input and output streams 

    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in)); 
    //Creates the reader to read what the client inputs 
    final BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 
    //Creates the reader to read what the server writes to the client, has to be final as used in innerclass 
    writer = new BufferedWriter(new OutputStreamWriter(out)); 
    //Creates the writer so the client can write on the commandline 

    Thread serverThread = new Thread(){ 
     //Modifies the Thread class 
     public void run(){ 
     boolean quit = false; 
     while (!quit){ 
      String line = ""; 
      try{ 
      line = reader.readLine(); 
      //Tries to read what the server has sent 
      } 
      catch(IOException e){ 
      System.out.println("Error" + e.getMessage()); 
      quit = true; 
      //If it is unable to read what the server sent, it quits the loop 
      } 
      if (line != "null"){ 
       System.out.println(line); 
      //So long as the line sent is not "null" it prints the line to the client 
      } 
     } 
     }   
    }; 
    serverThread.start(); 
    //Starts the Thread 

    String input = stdin.readLine(); 
    while (input != null) { 
    writer.write(input); 
    writer.newLine(); 
    writer.flush(); 
    input = stdin.readLine(); 
    //Reads what the client writes 
    } 
    System.exit(1); 
    server.close(); 
} 
catch (IOException e) { 
    System.out.println("error" + e.getMessage()); 
    e.printStackTrace(); 
    //Catches any errors with reading and writing to and from the server 
} 
} 

加上的NetBeans的默認操作一些額外的擺動位。 任何幫助，將不勝感激，謝謝。

Answer 1

您的問題可能在這裏：

setVisible(true); 
initComponents(); 

你應該扭轉這個順序：

initComponents(); 
setVisible(true); 

而且，你似乎做的Socket工作。如果是這樣，希望你在後臺線程，而不是主要的Swing事件線程，美國東部時間這樣做。