点+按钮时候上面的文本域会变高并且把下面那个文本域覆盖了,如何做到不覆盖,下面的文本域自动下移package com.myframe;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class FrameTest extends JFrame{
public FrameTest() {
}
public static void main(String args[]){
SimpleFrame frame = new SimpleFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//frame.pack();
frame.setVisible(true);
}
}class SimpleFrame extends JFrame{
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEITH = 400;
public static final int DEFAULTMAX_HEIGHT = 120;
private JPanel panel;
private JTextArea textArea,textArea1;
private JScrollPane scrollPanel,scrollPanel1;
private JButton bigbutton;
private JToolBar bar; public SimpleFrame(){
setTitle("框框");
setSize(DEFAULT_WIDTH,DEFAULT_HEITH); bar = new JToolBar();
bigbutton = new JButton("+");
bigbutton.addActionListener(new AddAction()); bar.add(bigbutton);
add(bar,BorderLayout.NORTH); panel = new JPanel();
add(panel);
bar.add(bigbutton); textArea = new JTextArea();
textArea.setRows(5);
textArea.setColumns(20);
textArea.setLineWrap(true);
scrollPanel = new JScrollPane(textArea);
panel.add(scrollPanel);
textArea1 = new JTextArea();
textArea1.setRows(5);
textArea1.setColumns(20);
textArea1.setLineWrap(true);
scrollPanel1 = new JScrollPane(textArea1);
panel.add(scrollPanel1); JPopupMenu popup = new JPopupMenu();
textArea.setComponentPopupMenu(popup);
JMenuItem item = new JMenuItem("变大");
popup.add(item);
item.addActionListener(new AddAction());
textArea.add(popup);
} private class AddAction implements ActionListener{
public void actionPerformed(ActionEvent event){
int i= scrollPanel.getHeight();
if(i<DEFAULTMAX_HEIGHT){
scrollPanel.setBounds(
new Rectangle(scrollPanel.getX(), scrollPanel.getY(),
scrollPanel.getWidth(),
scrollPanel.getHeight() + 40));
scrollPanel.updateUI();
}
}
}
}
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;public class FrameTest extends JFrame{
public FrameTest() {
}
public static void main(String args[]){
SimpleFrame frame = new SimpleFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//frame.pack();
frame.setVisible(true);
}
}class SimpleFrame extends JFrame{
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEITH = 400;
public static final int DEFAULTMAX_HEIGHT = 120;
private JPanel panel;
private JTextArea textArea,textArea1;
private JScrollPane scrollPanel,scrollPanel1;
private JButton bigbutton;
private JToolBar bar; public SimpleFrame(){
setTitle("框框");
setSize(DEFAULT_WIDTH,DEFAULT_HEITH); bar = new JToolBar();
bigbutton = new JButton("+");
bigbutton.addActionListener(new AddAction()); bar.add(bigbutton);
add(bar,BorderLayout.NORTH); panel = new JPanel();
add(panel);
bar.add(bigbutton); textArea = new JTextArea();
textArea.setRows(5);
textArea.setColumns(20);
textArea.setLineWrap(true);
scrollPanel = new JScrollPane(textArea);
panel.add(scrollPanel);
textArea1 = new JTextArea();
textArea1.setRows(5);
textArea1.setColumns(20);
textArea1.setLineWrap(true);
scrollPanel1 = new JScrollPane(textArea1);
panel.add(scrollPanel1); JPopupMenu popup = new JPopupMenu();
textArea.setComponentPopupMenu(popup);
JMenuItem item = new JMenuItem("变大");
popup.add(item);
item.addActionListener(new AddAction());
textArea.add(popup);
} private class AddAction implements ActionListener{
public void actionPerformed(ActionEvent event){
int i= scrollPanel.getHeight();
if(i<DEFAULTMAX_HEIGHT){
scrollPanel.setBounds(
new Rectangle(scrollPanel.getX(), scrollPanel.getY(),
scrollPanel.getWidth(),
scrollPanel.getHeight() + 40));
scrollPanel.updateUI();
}
}
}
}
import java.awt.*;
import java.awt.event.*; public class FrameTest extends JFrame{
public FrameTest() {
}
public static void main(String args[]){
SimpleFrame frame = new SimpleFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//frame.pack();
frame.setVisible(true);
}
} class SimpleFrame extends JFrame{
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEITH = 400;
public static final int DEFAULTMAX_HEIGHT = 130;
private JPanel panel;
private JTextArea textArea,textArea1;
private JScrollPane scrollPanel,scrollPanel1;
private JButton bigbutton;
private JToolBar bar; public SimpleFrame(){
setTitle("dfsd");
setSize(DEFAULT_WIDTH,DEFAULT_HEITH); bar = new JToolBar();
bigbutton = new JButton("+");
bigbutton.addActionListener(new AddAction()); bar.add(bigbutton);
add(bar,BorderLayout.NORTH); panel = new JPanel();
add(panel);
bar.add(bigbutton); panel.setLayout(null);
textArea = new JTextArea();
textArea.setRows(5);
textArea.setColumns(20);
textArea.setLineWrap(true);
scrollPanel = new JScrollPane(textArea);
scrollPanel.setBounds(new Rectangle(20,20,100,50));
panel.add(scrollPanel);
textArea1 = new JTextArea();
textArea1.setRows(5);
textArea1.setColumns(20);
textArea1.setLineWrap(true);
scrollPanel1 = new JScrollPane(textArea1);
scrollPanel1.setBounds(new Rectangle(20,100,100,50));
panel.add(scrollPanel1); JPopupMenu popup = new JPopupMenu();
textArea.setComponentPopupMenu(popup);
JMenuItem item = new JMenuItem("變大");
popup.add(item);
item.addActionListener(new AddAction());
textArea.add(popup);
} private class AddAction implements ActionListener{
public void actionPerformed(ActionEvent event){
int i= scrollPanel.getHeight();
if(i <DEFAULTMAX_HEIGHT){
scrollPanel.setBounds(
new Rectangle(scrollPanel.getX(), scrollPanel.getY(),
scrollPanel.getWidth(),
scrollPanel.getHeight() + 40));
scrollPanel.updateUI();
if (scrollPanel.getY()+ scrollPanel.getHeight()> scrollPanel1.getY()){
scrollPanel1.setBounds(new Rectangle(scrollPanel1.getX(), scrollPanel.getY()+scrollPanel.getHeight()+20,scrollPanel1.getWidth(),
scrollPanel1.getHeight()));
panel.add(scrollPanel1);
}
scrollPanel1.updateUI();
}
}
}
}