swing如何从主类加载JavaGUI类?
我是java UI编程新手
在java中,如何从主类调用UI类
public static void main(String[] args) {
// TODO code application logic here
FileExtractorGUI gui = new FileExtractorGUI();
gui.setVisible(true);
}
基本上
FileExtractorGUI is a gui class.
运行程序时如何加载GUI。目前,当我运行代码时,什么都没有发生
GUI类
package fileextractor;
import javax.swing.JOptionPane;
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author
*/
public class FileExtractorGUI extends javax.swing.JPanel {
/**
* Creates new form FileExtractorGUI
*/
public FileExtractorGUI() {
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() {
SourceField = new javax.swing.JTextField();
jLabel1 = new javax.swing.JLabel();
DestinationField = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
Extract = new javax.swing.JButton();
SourceField.setText("SourceField");
SourceField.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
SourceFieldActionPerformed(evt);
}
});
jLabel1.setText("SourceFolder");
DestinationField.setText("DestinationField");
jLabel2.setText("DestinationFolder");
Extract.setText("Extract");
Extract.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
ExtractActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel1)
.addGap(38, 38, 38)
.addComponent(SourceField, javax.swing.GroupLayout.PREFERRED_SIZE, 208, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addComponent(jLabel2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 24, Short.MAX_VALUE)
.addComponent(DestinationField, javax.swing.GroupLayout.PREFERRED_SIZE, 208, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(74, 74, 74))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(Extract)
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(26, 26, 26)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(SourceField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(DestinationField, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 194, Short.MAX_VALUE)
.addComponent(Extract)
.addContainerGap())
);
}// </editor-fold>
private void SourceFieldActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void ExtractActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String src = SourceField.getText();
String dest = DestinationField.getText();
CopyDirectoryExample copy = new CopyDirectoryExample();
copy.extract(src, dest);
JOptionPane.showMessageDialog(null, "Extracted!");
}
// Variables declaration - do not modify
private javax.swing.JTextField DestinationField;
private javax.swing.JButton Extract;
private javax.swing.JTextField SourceField;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
// End of variables declaration
}
根据评论中的要求,我上传了GUI类代码
# 1 楼答案
首先放置一个JFrame,然后用面板填充它
从doc
# 2 楼答案
尝试创建JFrame并添加面板
# 3 楼答案
无法显示
FileExtractorGUI
,因为它扩展了JPanel
。 每个组件都必须是JFrame
或Window
的子组件换线
到
# 4 楼答案