java编译文本编辑器

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class EditorJFrame extends JFrame implements ActionListener, ItemListener, MouseListener
{
private JTextField text_size; //字号文本行
private JCheckBox checkbox_bold, checkbox_italic; //粗体、斜体复选框
private JButton button_cut, button_copy, button_paste; //剪切、复制、粘贴按钮
private JTextArea textarea; //文本区

private JPopupMenu popupmenu; //快捷菜单
private JDialog dialog; //出错提示对话框
private JLabel label_dialog; //对话框中的标签

public EditorJFrame()
{
super("文本编辑器"); //默认BorderLayout布局

this.setSize(500,300);
this.setLocation(300,240);
this.setDefaultCloseOperation(EXIT_ON_CLOSE); //单击窗口关闭按钮时，结束程序运行

textarea = new JTextArea("TextArea");
textarea.addMouseListener(this); //为文本区注册鼠标事件监听器
this.add(textarea); //文本区添加到框架的中部

JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEFT)); //面板为流布局，左对齐
this.add(panel,"North"); //面板添加到框架的北部
text_size = new JTextField("12",10);
panel.add(text_size);
text_size.addActionListener(this); //注册文本行的单击事件监听器

checkbox_bold = new JCheckBox("粗体"); //复选框
panel.add(checkbox_bold);
checkbox_bold.addItemListener(this); //注册复选框的选择事件监听器

checkbox_italic = new JCheckBox("斜体");
panel.add(checkbox_italic);
checkbox_italic.addItemListener(this);

this.addmyMenu(); //调用自定义方法，添加菜单
this.setVisible(true);
}

private void addmyMenu() //添加主菜单、快捷菜单、对话框
{
JMenuBar menubar = new JMenuBar(); //菜单栏
this.setJMenuBar(menubar); //框架上添加菜单栏

JMenu menu_file = new JMenu("文件"); //菜单
menubar.add(menu_file); //菜单栏中加入菜单
menu_file.add(new JMenuItem("打开")); //生成菜单项并加入到菜单
menu_file.add(new JMenuItem("保存"));

menu_file.addSeparator(); //加分隔线

JMenuItem menuitem_exit = new JMenuItem("退出");
menu_file.add(menuitem_exit);
menuitem_exit.addActionListener(this); //为菜单项注册单击事件监听器

JMenu menu_edit = new JMenu("编辑");
menubar.add(menu_edit);

JMenu menu_style = new JMenu("字形");
menu_style.add(new JCheckBoxMenuItem("粗体")); //复选菜单项
menu_style.add(new JCheckBoxMenuItem("斜体"));
menu_edit.add(menu_style); //菜单加入到菜单中成为二级菜单

JMenu menu_color = new JMenu("颜色");
menu_edit.add(menu_color);

ButtonGroup buttongroup = new ButtonGroup(); //按钮组
JRadioButtonMenuItem rbmi_red = new JRadioButtonMenuItem("红",true); //单选菜单项
buttongroup.add(rbmi_red); //单选菜单项添加到按钮组
menu_color.add(rbmi_red); //单选菜单项添加到菜单

JRadioButtonMenuItem rbmi_green = new JRadioButtonMenuItem("绿",true);
buttongroup.add(rbmi_green);
menu_color.add(rbmi_green);

JRadioButtonMenuItem rbmi_blue = new JRadioButtonMenuItem("蓝",true);
buttongroup.add(rbmi_blue);
menu_color.add(rbmi_blue);

menubar.add(new JMenu("帮助"));

popupmenu = new JPopupMenu(); //弹出式菜单对象
JMenuItem menuitem_cut = new JMenuItem("剪切");
menuitem_cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));//设置快捷键Ctrl+X
popupmenu.add(menuitem_cut); //加入剪切菜单项
menuitem_cut.addActionListener(this);

JMenuItem menuitem_copy = new JMenuItem("复制");
menuitem_copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));//设置快捷键Ctrl+C
popupmenu.add(menuitem_copy);
menuitem_copy.addActionListener(this);

JMenuItem menuitem_paste = new JMenuItem("粘贴");
menuitem_paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));//设置快捷键Ctrl+V
popupmenu.add(menuitem_paste);
menuitem_paste.addActionListener(this);

textarea.add(popupmenu); //文本区添加快捷菜单

dialog = new JDialog(this,"提示");
dialog.setSize(240,80);
label_dialog = new JLabel("",JLabel.CENTER);
dialog.add(label_dialog);
dialog.setDefaultCloseOperation(HIDE_ON_CLOSE); //单击对话框的关闭按钮时，隐藏对话框而不结束程序运行
}

public void actionPerformed(ActionEvent e) //单击事件处理程序
{
if(e.getActionCommand()=="退出") //不能用switch(int)语句
System.exit(0); //单击菜单项时结束程序

if(e.getActionCommand()=="剪切")
textarea.cut(); //将选中文本剪切送系统剪贴板

if(e.getActionCommand()=="复制")
textarea.copy();

if(e.getActionCommand()=="粘贴")
textarea.paste();

if(e.getSource()==text_size) //单击文本行时，改变字号
{
int size=0;
try
{
size = Integer.parseInt(text_size.getText());
if (size<=0 || size>72)
throw new Exception("SizeException"); //抛出异常对象
java.awt.Font font = textarea.getFont();
textarea.setFont(new Font(font.getName(),font.getStyle(),size));
}
catch(NumberFormatException nfe)
{
label_dialog.setText("\""+text_size.getText()+"\" 不能转换成整数，请重新输入!");
dialog.setLocation(this.getX()+100,this.getY()+100);
dialog.setVisible(true);
}
catch(Exception ex)
{
if (ex.getMessage()=="SizeException") //捕获自己抛出的异常对象
{
label_dialog.setText(size+" 字号不合适，请重新输入!");
dialog.setLocation(this.getX()+100,this.getY()+100);
dialog.setVisible(true);
}
}
finally{}
}
}

public void itemStateChanged(ItemEvent e) //复选框选择事件处理程序
{ //实现ItemListener接口中的方法
Font font = textarea.getFont();
int style = font.getStyle();
if (e.getSource()==checkbox_bold)
style = style ^ 1; //整数的位运算，异或^

if (e.getSource()==checkbox_italic)
style = style ^ 2;
textarea.setFont(new Font(font.getName(),style,font.getSize()));
}

public void mouseClicked(MouseEvent mec) //单击鼠标时触发
{ //实现MouseListener接口中的方法
if (mec.getModifiers()==mec.BUTTON3_MASK) //单击的是鼠标右键
popupmenu.show(textarea,mec.getX(),mec.getY());//在鼠标单击处显示快捷菜单
}

public void mousePressed(MouseEvent mep) { }
public void mouseReleased(MouseEvent mer) { }
public void mouseEntered(MouseEvent mee) { }
public void mouseExited(MouseEvent mex) { }
public void mouseDragged(MouseEvent med) { }

public static void main(String arg[])
{
new EditorJFrame();
}
}本回答被提问者采纳

楼上的大致框架出来了。至于public void actionPerformed(ActionEvent e){

//

}
中的方法自己写。
还有别忘记注册监听器

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

class TextEdit extends JFrame implements ActionListener{

JButton b1,b2,b3,b4;

JTextArea t;

JLabel l;

JPanel p1,p2;

TextEdit(){

super("信手涂鸦");

setDefaultCloseOperation(3);

setBounds(30,30,400,200);

Container c=getContentPane();

c.setLayout(new FlowLayout());

b1=new JButton("Clear");

b2=new JButton("Open");

b3=new JButton("Save");

b4=new JButton("Exit");

t=new JTextArea(5,5);

l=new JLabel("Clear--清空,Open--打开,Save--保存,Exit--退出");

p1=new JPanel();

p2=new JPanel();

p1.setLayout(new GridLayout(4,1));

p1.add(b1);p1.add(b2);p1.add(b3);p1.add(b4);

p2.setLayout(new BorderLayout());

p2.add(t);p2.add(l,BorderLayout.SOUTH);

c.add(p1);c.add(p2);

setVisible(true);

}

public void actionPerformed(ActionEvent e){

//

}

public static void main(String[] args){

new TextEdit();

}

}

是要在java编译器里编译你还是要编译器的源码呢？

呵呵 怎么和我的作业一样！