Swing 动态JPanel加法
我正在尝试创建一个动态Swing GUI。单击“添加/删除”按钮时,我需要添加/删除Swing 动态JPanel加法,swing,jpanel,java,Swing,Jpanel,Java,我正在尝试创建一个动态Swing GUI。单击“添加/删除”按钮时,我需要添加/删除JPanels。我无法动态添加JPanels。最初JPanel加载,但JPanel的数组无法工作。我该怎么做 import java.awt.*; import java.awt.event.*; import java.io.*; import javax.print.attribute.standard.JobHoldUntil; import javax.swing.*; public class Ac
JPanels
。我无法动态添加JPanels
。最初JPanel
加载,但JPanel的数组无法工作。我该怎么做
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.print.attribute.standard.JobHoldUntil;
import javax.swing.*;
public class AccessoryFileChooser2 extends JFrame {
JFileChooser chooser = null;
JLabel statusbar;
JLabel file;
JCheckBox checkBox;
int count;
int increment;
JPanel [] panel = new JPanel[10]; //array
public AccessoryFileChooser2() {
setSize(350, 200);
count=0;
increment=1;
setDefaultCloseOperation(EXIT_ON_CLOSE);
final Container c = getContentPane();
c.setLayout(new BorderLayout());
checkBox =new JCheckBox("");
String fileName = "Choose File Name";
file = new JLabel(fileName);
final JButton accButton = new JButton("Browse");
final JButton add = new JButton("Add");
final JButton validate = new JButton("Validate");
final JButton delete = new JButton("Delete");
accButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
int option = chooser.showOpenDialog(AccessoryFileChooser2.this);
if (option == JFileChooser.APPROVE_OPTION) {
statusbar.setText(
(
chooser.getSelectedFile().getPath()));
}
}
});
statusbar = new JLabel("Output of your selection will go here");
chooser = new JFileChooser();
final JPanel panels =new JPanel();
//JPanel panel2 =new JPanel();
panel[count]=new JPanel();
panel[count].add(checkBox);
panel[count].add(file);
panel[count].add(accButton );
panel[count].add(statusbar);
c.add(panel[count],BorderLayout.CENTER);
panels.add(add);
panels.add(delete);
panels.add(validate);
add.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
count=count+1;;
increment=increment+1;;
panel[count]=new JPanel();
System.out.println("You clicked the ADD button");
panel[count].add(checkBox);
panel[count].add(file);
panel[count].add(accButton );
panel[count].add(statusbar);
panel[count].revalidate();
panel[count].repaint();
panel[count].updateUI();
c.add(panel[count]);
}
});
delete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
increment--;
System.out.println("You clicked the Delete button");
System.out.println(checkBox.isSelected());
for (int i = 0; i < panel.length; i++) {
JCheckBox box=(JCheckBox) panel[i].getComponent(0);
if(box.isSelected()){
c.remove(panel[i]);
}
}
}
});
validate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
System.out.println("You clicked the Validate button");
}
});
c.add(panels,BorderLayout.SOUTH);
}
public static void main(String args[]) {
AccessoryFileChooser2 afc = new AccessoryFileChooser2();
afc.setVisible(true);
}
}
import java.awt.*;
导入java.awt.event.*;
导入java.io.*;
导入javax.print.attribute.standard.JobHoldUntil;
导入javax.swing.*;
公共类AccessoryFileChooser2扩展了JFrame{
JFileChooser-chooser=null;
JLabel状态栏;
JLabel文件;
JCheckBox复选框;
整数计数;
整数增量;
JPanel[]panel=newjpanel[10];//数组
公共访问文件选择器2(){
设置大小(350200);
计数=0;
增量=1;
setDefaultCloseOperation(关闭时退出);
最终容器c=getContentPane();
c、 setLayout(新的BorderLayout());
复选框=新的JCheckBox(“”);
String fileName=“选择文件名”;
文件=新的JLabel(文件名);
最终JButton accButton=新JButton(“浏览”);
最终JButton add=新JButton(“add”);
最终JButton validate=新JButton(“validate”);
最终JButton delete=新JButton(“delete”);
accButton.addActionListener(新ActionListener(){
已执行的公共无效行动(行动事件ae){
int option=chooser.showOpenDialog(AccessoryFileChooser2.this);
if(option==JFileChooser.APPROVE\u选项){
statusbar.setText(
(
chooser.getSelectedFile().getPath());
}
}
});
statusbar=new JLabel(“您选择的输出将转到此处”);
chooser=newjfilechooser();
最终JPanel面板=新JPanel();
//JPanel panel2=新的JPanel();
panel[count]=新的JPanel();
面板[计数]。添加(复选框);
面板[计数]。添加(文件);
面板[计数]。添加(ACC按钮);
面板[计数]。添加(状态栏);
c、 添加(面板[计数],边框布局.中间);
面板。添加(添加);
面板。添加(删除);
面板。添加(验证);
add.addActionListener(新ActionListener(){
已执行的公共无效操作(操作事件e)
{
计数=计数+1;;
增量=增量+1;;
panel[count]=新的JPanel();
System.out.println(“您单击了添加按钮”);
面板[计数]。添加(复选框);
面板[计数]。添加(文件);
面板[计数]。添加(ACC按钮);
面板[计数]。添加(状态栏);
面板[count]。重新验证();
面板[count]。重新绘制();
面板[count].updateUI();
c、 添加(面板[计数]);
}
});
delete.addActionListener(新ActionListener(){
已执行的公共无效操作(操作事件e)
{
增量--;
System.out.println(“您单击了删除按钮”);
System.out.println(checkBox.isSelected());
对于(int i=0;i
添加c.validate()
在c.Add(面板[计数])之后代码>以更新GUI
还建议检查JPanel
s的当前数量,因为这样,您将很快获得ArrayIndexOutOfBoundsException
。我在以下方面取得了成功:
repaint();
validate();
在运行时更改gui之后。当我在组件/容器上创建、删除、移动面板时,我调用这两种方法。从可见GUI添加或删除组件时,一般代码应为:
panel.add(...);
panel.revalidate();
panel.repaint();
重新验证基本上调用布局管理器
重新喷漆可确保组件在布局发生变化时重新喷漆。不正确,有很多新手错误
1/因为与您为JPanels
JPanel [] panel = new JPanel[10];
您需要为其JComponents
创建Array
,因为一个JComponent只能添加一次
编辑:部分修订/更改代码显示此问题
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.LineBorder;
public class AccessoryFileChooser2 extends JFrame {
private static final long serialVersionUID = 1L;
private JFileChooser chooser = null;
private JLabel statusbar;
private JLabel file;
private JCheckBox checkBox;
private int count;
private int increment = 10;
private JPanel parentPanel = new JPanel();
private JPanel panels = new JPanel();
private JPanel[] panel = new JPanel[increment]; //array
private JButton accButton = new JButton("Browse");
private JButton addButton = new JButton("Add");
private JButton validate = new JButton("Validate");
private JButton delete = new JButton("Delete");
public AccessoryFileChooser2() {
count = 0;
parentPanel.setLayout(new GridLayout(10, 1, 10, 10));
checkBox = new JCheckBox("");
String fileName = "Choose File Name";
file = new JLabel(fileName);
accButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
int option = chooser.showOpenDialog(AccessoryFileChooser2.this);
if (option == JFileChooser.APPROVE_OPTION) {
statusbar.setText((chooser.getSelectedFile().getPath()));
}
}
});
statusbar = new JLabel("Output of your selection will go here");
chooser = new JFileChooser();
panel[count] = new JPanel();
panel[count].add(checkBox);
panel[count].add(file);
panel[count].add(accButton);
panel[count].add(statusbar);
panel[count].setPreferredSize(new Dimension(450, 40));
panel[count].setBorder(new LineBorder(Color.BLACK, 1));
parentPanel.add(panel[count]);
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (count < increment - 1) {
count += 1;
panel[count] = new JPanel();
System.out.println("You clicked the ADD button");
panel[count].add(checkBox);
panel[count].add(file);
panel[count].add(accButton);
panel[count].add(statusbar);
panel[count].revalidate();
panel[count].repaint();
//panel[count].updateUI();
parentPanel.add(panel[count]);
parentPanel.revalidate();
parentPanel.repaint();
pack();
if (count == increment - 1) {
addButton.setEnabled(false);
}
}
}
});
delete.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("You clicked the Delete button");
System.out.println(checkBox.isSelected());
/*for (int i = 0; i < parentPanel.getComponentCount(); i++) {
JCheckBox box = (JCheckBox) panel[i].getComponent(0);
if (box.isSelected()) {
parentPanel.remove(panel[i]);
}
}*/
}
});
validate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("You clicked the Validate button");
}
});
panels.setLayout(new GridLayout(1, 3, 10, 10));
panels.add(addButton);
panels.add(delete);
panels.add(validate);
add(parentPanel, BorderLayout.CENTER);
add(panels, BorderLayout.SOUTH);
setDefaultCloseOperation(EXIT_ON_CLOSE);
pack();
setVisible(true);
}
public static void main(String args[]) {
AccessoryFileChooser2 afc = new AccessoryFileChooser2();
}
}
import java.awt.*;
导入java.awt.event.*;
导入javax.swing.*;
导入javax.swing.border.LineBorder;
公共类AccessoryFileChooser2扩展了JFrame{
私有静态最终长serialVersionUID=1L;
private JFileChooser chooser=null;
专用JLabel状态栏;
专用JLabel文件;
私有JCheckBox复选框;
私人整数计数;
私有整数增量=10;
private JPanel parentPanel=new JPanel();
私有JPanel面板=新JPanel();
private JPanel[]panel=new JPanel[increment];//数组
私有JButton accButton=新JButton(“浏览”);
私有JButton addButton=新JButton(“添加”);
私有JButton validate=新JButton(“validate”);
私有JButton delete=新JButton(“delete”);
公共访问文件选择器2(){
计数=0;
setLayout(新的GridLayout(10,1,10,10));
复选框=新的JCheckBox(“”);
String fileName=“选择文件名”;
文件=新的JLabel(文件名);
accButton.addActionListener(新ActionListener(){
已执行的公共无效行动(行动事件ae){
int option=chooser.showOpenDialog(AccessoryFileChooser2.this);
if(option==JFileChooser.APPROVE\u选项){
statusbar.setText((chooser.getSelectedFile().getPath());
}
}
});
statusbar=new JLabel(“您选择的输出将转到此处”);
chooser=newjfilechooser();
panel[count]=新的JPanel();
面板[计数]。添加(复选框);
面板[count]。添加(fil)