The primary function of this program is to insert mathematical symbols into a text editor (notepad). The class
JLabel is used to display the symbols.
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94 | import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class UnicodeTextWriter extends JFrame{
private JLabel lchar[]=null;
private JTextArea ta=null;
private JButton bsave=null;
public UnicodeTextWriter(){
super("Unicode Text Writer");
setSize(800,600);
JPanel ptop=new JPanel();
ptop.setLayout(new FlowLayout());
ptop.setPreferredSize(new Dimension(800,150));
lchar=new JLabel[256];
char c=0x2200;
for(int i=0;i<lchar.length;i++){
lchar[i]=new JLabel(c+"");
lchar[i].setBorder(BorderFactory.createLineBorder(Color.black));
lchar[i].addMouseListener(new MouseHandler());
ptop.add("Center",lchar[i]);
c++;
}
ta=new JTextArea();
ta.setColumns(20);
bsave=new JButton("Save");
bsave.addActionListener(new ButtonHandler());
JPanel pmain=new JPanel();
pmain.setLayout(new BorderLayout());
pmain.add("North",ptop);
pmain.add("Center",ta);
pmain.add("South",bsave);
add(pmain);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
show();
}
class MouseHandler implements MouseListener{
/*
public void mouseMoved(MouseEvent e){
}
public void mouseDragged(MouseEvent e){
}*/
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e){
}
public void mouseReleased(MouseEvent e){
}
public void mousePressed(MouseEvent e){
}
public void mouseClicked(MouseEvent e){
for(int i=0;i<lchar.length;i++){
if(e.getSource()==lchar[i]){
int pos=ta.getCaretPosition();
ta.insert(lchar[i].getText(),pos);
}
}
}
}
class ButtonHandler implements ActionListener{
public void actionPerformed(ActionEvent ex){
String stemp=ta.getText();
try {
FileOutputStream fos = new FileOutputStream("test.txt");
Writer out = new OutputStreamWriter(fos, "UTF8");
out.write(stemp);
out.close();
} catch(Exception exx) {
}
}
}
public static void main(String[] args){
new UnicodeTextWriter();
}
}
|
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