netbean + swing
入门推荐 http://java.sun.com/docs/books/tutorial/uiswing/index.html
---------------------------------helloworld
"Hello World!" for the NetBeans IDE
netbean 新建项目 应用程序,贴上代码，点运行就可以看到弹出效果
package javaapplication1;
import javax.swing.*;
public class Main {
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("HelloWorldSwing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Add the ubiquitous "Hello World" label.
JLabel label = new JLabel("Hello World");
frame.getContentPane().add(label);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}
--------------------------------Opening a Project for an Example [netbean]
In NetBeans IDE, choose File > Open Project. In the file chooser, select the project and click Open Project Folder.
error:{".../j2se-project/3":test-roots} is expected =========>>>>
project.xml Code:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://www.netbeans.org/ns/project/1">
<type>org.netbeans.modules.java.j2seproject</type>
<configuration>
<data xmlns="http://www.netbeans.org/ns/j2se-project/3">
<name>TreeDemo</name>
<minimum-ant-version>1.6.5</minimum-ant-version>
<source-roots>
<root id="src.dir"/>
</source-roots>
</data>
</configuration>
</project>
to be changed to
Code:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://www.netbeans.org/ns/project/1">
<type>org.netbeans.modules.java.j2seproject</type>
<configuration>
<data xmlns="http://www.netbeans.org/ns/j2se-project/3">
<name>TreeDemo</name>
<minimum-ant-version>1.6.5</minimum-ant-version>
<source-roots>
<root id="src.dir"/>
</source-roots>
<test-roots>
<root id="test.src.dir"/>
</test-roots>
</data>
</configuration>
</project>
再次导入即可
-----------------------------在 NetBeans IDE 中设计 Swing GUI
安装插件 GUI生成器,这样 在“项目”窗口中，右键单击 "ContactEditor" 节点，然后选择“新建”>“JFrame 窗体 ”。
------------------------------ 温度转换
package javaapplication1;
/**
*
* @author Administrator
*/
public class CelsiusConverterGUI extends javax.swing.JFrame {
/** Creates new form CelsiusConverterGUI */
public CelsiusConverterGUI() {
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.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
private void initComponents() {
tempTextField = new javax.swing.JTextField();
celsiusLabel = new javax.swing.JLabel();
convertButton = new javax.swing.JButton();
fahrenheitLabel = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("Celsius Converter");
celsiusLabel.setText("Celsius");
convertButton.setText("Convert");
convertButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
convertButtonActionPerformed(evt);
}
});
fahrenheitLabel.setText("Fahrenheit");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(celsiusLabel))
.addGroup(layout.createSequentialGroup()
.addComponent(convertButton)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(fahrenheitLabel)))
.addContainerGap(27, Short.MAX_VALUE))
);
layout.linkSize(javax.swing.SwingConstants.HORIZONTAL, new java.awt.Component[] {convertButton, tempTextField});
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(tempTextField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(celsiusLabel))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(convertButton)
.addComponent(fahrenheitLabel))
.addContainerGap(21, Short.MAX_VALUE))
);
pack();
}// </editor-fold>//GEN-END:initComponents
private void convertButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_convertButtonActionPerformed
//Parse degrees Celsius as a double and convert to Fahrenheit
int tempFahr = (int)((Double.parseDouble(tempTextField.getText()))
* 1.8 + 32);
fahrenheitLabel.setText(tempFahr + " Fahrenheit");
}//GEN-LAST:event_convertButtonActionPerformed
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new CelsiusConverterGUI().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JLabel celsiusLabel;
private javax.swing.JButton convertButton;
private javax.swing.JLabel fahrenheitLabel;
private javax.swing.JTextField tempTextField;
// End of variables declaration//GEN-END:variables
}