早早的起来，做了一个简单文本编译器嗨了皮 - 黑马程序员技术交流社区

import java.awt.*;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Test8 {
private Frame f;
private MenuBar mb;
private Menu fileMenu;
private MenuItem openItem, saveItem, closeItem;
private FileDialog openDia, saveDia;
private TextArea ta;
private File file;
public Test8() {
init();
}
public void init() {
f = new Frame("my window");
f.setBounds(300, 100, 500, 600);
mb = new MenuBar();
fileMenu = new Menu("文件");
openItem = new MenuItem("打开");
saveItem = new MenuItem("保存");
closeItem = new MenuItem("退出");
ta = new TextArea();
fileMenu.add(openItem);
fileMenu.add(saveItem);
fileMenu.add(closeItem);
mb.add(fileMenu);
f.setMenuBar(mb);
f.add(ta);
openDia = new FileDialog(f, "我要打开", FileDialog.LOAD);
saveDia = new FileDialog(f, "我要保存", FileDialog.SAVE);
myEvent();
f.setVisible(true);
}
private void myEvent() {
saveItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if (file == null) {
saveDia.setVisible(true);
String path = saveDia.getDirectory();// 得到文件夹
String name = saveDia.getFile(); // 得到文件名字
if (path == null || name == null) {
return;
}
file = new File(path, name);
}
try {
BufferedWriter bufw = new BufferedWriter(new FileWriter(
file));
String text = ta.getText();
bufw.write(text);
bufw.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
openItem.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
openDia.setVisible(true);
String path = openDia.getDirectory();// 得到文件夹
String name = openDia.getFile(); // 得到文件名字
// System.out.println(path+"..."+name);
if (path == null || name == null) {
return;
}
file = new File(path, name);
ta.setText("");
try {
BufferedReader br = new BufferedReader(new FileReader(file));
String text = ta.getText();
String line = null;
try {
while ((line = br.readLine()) != null) {
ta.append(line + "\r\n");
}
br.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
}
public static void main(String[] args) {
new Test8();
}
}

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