如何使用Netbeans在JFrame中显示文本?如何清除JFrame中的文本?
答
如果您使用Netbeans GUI构建器,那么有一个很好的初学者的tutorial。否则,如果你手工编码,有一个很好的指南,秋千上的Oracle的网站:http://download.oracle.com/javase/tutorial/uiswing/TOC.html
答
您可以使用此
@Override
public void paintComponents(Graphics g) {
super.paintComponents(g);
g.drawString("Hello", 0, 0);
}
,或者使用了JTextField
jTextField1.setText("Hello");
答
您可以创建一个JLabel。
JLabel l1=new JLabel("Your text");
l1.setText(""); // clear the text
答
创建标签的文字:
JLabel label1 = new JLabel("your text here");
更改标签的文本:
label1.setText("your new text here");
,并最终清除标签:
label1.setText("");
而你所要做的就是在你身上放置标签r布局或你正在使用的布局系统,然后将其添加到JFrame中。
答
检查属性。在Swing控件中,您将找到JLabel.Drag &将它放在JFRAME中。
答
此代码使用Netbeans工程..创建一个新的框架,并为您在框架中间设置文本..
public class NewJFrame extends javax.swing.JFrame {
public NewJFrame() {
initComponents();
}
/**
* 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() {
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setText("Label For The JFrame");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(107, 107, 107)
.addComponent(jLabel1)
.addContainerGap(141, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(88, 88, 88)
.addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 25, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(187, 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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.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 NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JLabel jLabel1;
// End of variables declaration
}
替换此jLabel1.setText("Label For The JFrame");
使用代码自定义标签。
,当你想空白标签使用jLabel1.setText("");
谢谢..
注:此无关使用Netbeans。将Netbeans视为仅用于编辑源的工具,而不是语言本身的一部分。 – jabal 2012-03-14 14:18:24