标签：
转自：http://takeme.iteye.com/blog/1876853
模拟window开打文件
1 import java.awt.Button; 2 import java.awt.Dialog; 3 import java.awt.FlowLayout; 4 import java.awt.Frame; 5 import java.awt.Label; 6 import java.awt.TextArea; 7 import java.awt.TextField; 8 import java.awt.event.ActionEvent; 9 import java.awt.event.ActionListener; 10 import java.awt.event.KeyAdapter; 11 import java.awt.event.KeyEvent; 12 import java.awt.event.WindowAdapter; 13 import java.awt.event.WindowEvent; 14 import java.io.File; 15 16 public class MyWinDemo { 17 18 private Frame f; 19 private TextField tf; 20 private Button btn; 21 private TextArea ta; 22 private Dialog d; 23 private Label lab; 24 private Button okbtn; 25 26 MyWinDemo(){ 27 init(); 28 } 29 30 private void init(){ 31 f=new Frame("my Window"); 32 f.setBounds(300,100,600,500); 33 f.setLayout(new FlowLayout()); 34 35 tf=new TextField(60); 36 37 btn=new Button("转到"); 38 ta=new TextArea(25,70); 39 40 d=new Dialog(f,"提示信息-self",true); 41 d.setBounds(400,200,250,150); 42 d.setLayout(new FlowLayout()); 43 44 lab=new Label(); 45 okbtn=new Button("确定"); 46 47 d.add(lab); 48 d.add(okbtn); 49 50 51 f.add(tf); 52 f.add(btn); 53 f.add(ta); 54 55 myEvent(); 56 f.setVisible(true); 57 58 } 59 60 61 private void myEvent() { 62 63 //添加 回车 时候 自动转到 64 tf.addKeyListener(new KeyAdapter() { 65 @Override 66 public void keyPressed(KeyEvent e) { 67 // TODO Auto-generated method stub 68 if(e.getKeyCode()==KeyEvent.VK_ENTER){ 69 showDir(); 70 } 71 } 72 }); 73 //确定按钮事件 74 okbtn.addActionListener(new ActionListener() { 75 76 @Override 77 public void actionPerformed(ActionEvent e) { 78 // TODO Auto-generated method stub 79 d.setVisible(false); 80 } 81 }); 82 83 d.addWindowListener(new WindowAdapter() { 84 @Override 85 public void windowClosing(WindowEvent e) { 86 // TODO Auto-generated method stub 87 d.setVisible(false); 88 } 89 90 }); 91 92 btn.addActionListener(new ActionListener() { 93 94 @Override 95 public void actionPerformed(ActionEvent e) { 96 showDir(); 97 } 98 99 }); 100 101 102 f.addWindowListener(new WindowAdapter() { 103 public void windowClosing(WindowEvent e){ 104 System.exit(0); 105 } 106 107 }); 108 109 } 110 private void showDir() { 111 String dirPath=tf.getText(); 112 113 File dir=new File(dirPath); 114 if(dir.exists() && dir.isDirectory()){ 115 ta.setText(""); 116 String[] names=dir.list(); 117 for (String name : names) { 118 ta.append(name+"\r\n"); 119 //ta.setText(text); 120 } 121 }else{ 122 String info="您输入的信息:"+dirPath+"有误,请重新输入"; 123 lab.setText(info); 124 d.setVisible(true); 125 } 126 127 tf.setText(""); 128 } 129 public static void main(String[] args) { 130 new MyWinDemo(); 131 } 132 133 }
模拟简单记事本
1 import java.awt.FileDialog; 2 import java.awt.Frame; 3 import java.awt.Menu; 4 import java.awt.MenuBar; 5 import java.awt.MenuItem; 6 import java.awt.TextArea; 7 import java.awt.event.ActionEvent; 8 import java.awt.event.ActionListener; 9 import java.awt.event.WindowAdapter; 10 import java.awt.event.WindowEvent; 11 import java.io.BufferedReader; 12 import java.io.BufferedWriter; 13 import java.io.File; 14 import java.io.FileReader; 15 import java.io.FileWriter; 16 import java.io.IOException; 17 18 /** 19 * 实现菜单栏 20 */ 21 public class MyMenuDemo { 22 23 24 private Frame f; 25 private MenuBar mb; 26 private Menu m,subm; 27 private MenuItem closeItem,openItem,saveItem,subItem1,subItem; 28 private FileDialog openDialog,saveDialog; 29 private TextArea ta; 30 private File file; 31 32 MyMenuDemo(){ 33 init(); 34 } 35 36 private void init(){ 37 f=new Frame("my Window"); 38 f.setBounds(300,100,600,500); 39 //f.setLayout(); 40 41 mb=new MenuBar(); 42 m=new Menu("文件"); 43 44 closeItem=new MenuItem("退出"); 45 openItem=new MenuItem("打开"); 46 saveItem=new MenuItem("保存"); 47 48 subm=new Menu("新建"); 49 subItem1=new MenuItem("Web Project"); 50 subItem=new MenuItem("Java Project"); 51 subm.add(subItem); 52 subm.add(subItem1); 53 54 m.add(subm); 55 m.add(openItem); 56 m.add(saveItem); 57 m.add(closeItem); 58 mb.add(m); 59 60 openDialog=new FileDialog(f,"我要打开",FileDialog.LOAD); 61 saveDialog=new FileDialog(f,"我要保存",FileDialog.SAVE); 62 63 ta=new TextArea(); 64 65 f.add(ta); 66 f.setMenuBar(mb); 67 myEvent(); 68 69 f.setVisible(true); 70 71 } 72 73 private void myEvent() { 74 75 saveItem.addActionListener(new ActionListener() { 76 77 @Override 78 public void actionPerformed(ActionEvent e) { 79 // TODO Auto-generated method stub 80 if(file==null){ 81 saveDialog.setVisible(true); 82 String dirPath=saveDialog.getDirectory(); 83 String fileName=saveDialog.getFile(); 84 if(dirPath==null || fileName==null) 85 return; 86 file=new File(dirPath,fileName); 87 } 88 try { 89 90 BufferedWriter bufw=new BufferedWriter(new FileWriter(file)); 91 92 String text=ta.getText(); 93 94 bufw.write(text); 95 bufw.close(); 96 } catch (IOException e2) { 97 throw new RuntimeException("保存失败"); 98 } 99 100 } 101 }); 102 103 //打开菜单 104 openItem.addActionListener(new ActionListener() { 105 106 @Override 107 public void actionPerformed(ActionEvent e) { 108 // TODO Auto-generated method stub 109 openDialog.setVisible(true); 110 String dirPath=openDialog.getDirectory(); 111 String fileName=openDialog.getFile(); 112 System.out.println(dirPath+"...."+fileName); 113 if(dirPath==null || fileName==null) 114 return; 115 ta.setText(""); 116 file=new File(dirPath,fileName); 117 try { 118 BufferedReader bufr=new BufferedReader(new FileReader(file)); 119 String line=null; 120 while((line=bufr.readLine())!=null){ 121 ta.append(line+"\r\n"); 122 } 123 bufr.close(); 124 } catch (IOException e2) { 125 throw new RuntimeException("打开异常"); 126 } 127 128 } 129 }); 130 131 132 closeItem.addActionListener(new ActionListener() { 133 134 @Override 135 public void actionPerformed(ActionEvent e) { 136 // TODO Auto-generated method stub 137 System.exit(0); 138 } 139 }); 140 141 f.addWindowListener(new WindowAdapter() { 142 public void windowClosing(WindowEvent e){ 143 System.exit(0); 144 } 145 146 }); 147 148 } 149 150 151 public static void main(String[] args) { 152 // TODO Auto-generated method stub 153 new MyMenuDemo(); 154 } 155 156 }
标签：
原文地址：http://www.cnblogs.com/fnlingnzb-learner/p/5953845.html
