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我是相當新的擺動，所以我相信這可能是簡單的。希望你們中的一些人能幫我一把。 這是一個更復雜的情況的一部分，但我設法把它放在一個簡單的例子。java swing組件不顯示內部面板
我正在使用Netbeans，我試圖創建一個包含一些複選框（由框架動態添加）的面板。
如果我使用可視化編輯器創建具有本地組件的整個結構，它可以很好地工作，但事情是我需要一個自定義面板，這是它的中斷點。
當我執行應用程序時，我只看到一個沒有內容的空白幀。
代碼如下
框架：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package contacorrente;
import java.util.HashSet;
import java.util.Set;
import javax.swing.JButton;
import javax.swing.JCheckBox;
/**
*
* @author afsilva
*/
public class Test extends javax.swing.JFrame {
/**
* Creates new form Test
*/
public Test() {
initComponents();
this.testPanel1.add(new JCheckBox("ergcdf"));
this.testPanel1.add(new JCheckBox("ergcdf1"));
this.testPanel1.add(new JCheckBox("ergcdf2"));
this.testPanel1.add(new JCheckBox("ergcdf3"));
this.testPanel1.add(new JCheckBox("ergcdf4"));
this.testPanel1.validate();
this.validate();
}
/**
* This method is called from within the constructor to initialize 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">
private void initComponents() {
testPanel1 = new contacorrente.TestPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setBackground(new java.awt.Color(51, 204, 255));
testPanel1.setBackground(new java.awt.Color(255, 51, 204));
testPanel1.setName("testPanel1"); // NOI18N
javax.swing.GroupLayout testPanel1Layout = new javax.swing.GroupLayout(testPanel1);
testPanel1.setLayout(testPanel1Layout);
testPanel1Layout.setHorizontalGroup(
testPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
testPanel1Layout.setVerticalGroup(
testPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(testPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(testPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* 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(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(Test.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new Test().setVisible(true);
}
});
}
// Variables declaration - do not modify
private contacorrente.TestPanel testPanel1;
// End of variables declaration
}
我不會粘貼板代碼，因爲它只是一個空的面板（沒有自定義代碼）
幫助，請..
在此先感謝
您絕對是對的！這種行爲很奇怪，組件的默認大小不應該爲零！ – cattox
@cattox不，默認的組件大小是'0,0'，如果你想看到它們，你需要設置它們的大小 – BackSlash