menu1.java

java写的记事本

package Application;
import java.awt.*;
import java.io.*;
import java.awt.datatransfer.*;
public class Menu1 extends Frame {
	static int count = 0;
	String name = null;
	String path = null;
	String txt ="";
	Menu f = new Menu( "文件(F)" );
	Menu e = new Menu( "编辑(E)" );
	Menu g = new Menu( "格式(G)" );
	Menu v = new Menu( "查看(V)" );
	Menu h = new Menu( "帮助(H)" );
	TextArea ta= new TextArea( txt , 100 , 3000);
	MenuBar mb = new MenuBar();
	Clipboard clipbd = getToolkit().getSystemClipboard();
	MenuItem[] mi_f = { new MenuItem("新建(N)       Ctrl+N"),
						new MenuItem("打开(O)       Ctrl+O"),
						new MenuItem("保存(S)       Ctrl+S"),
						new MenuItem("另存为(I)..."),
						new MenuItem("页面设置(U)"),
						new MenuItem("打印(P)...    Ctrl+p"),
						new MenuItem("退出(X)")
	};
	MenuItem[] mi_e ={ new MenuItem("撤销(U)     Ctrl+Z"),
					   new MenuItem("剪切(T)     Ctrl+X"),
					   new MenuItem("复制(C)     Ctrl+C"),
					   new MenuItem("粘贴(P)     Ctrl+V"),
					   new MenuItem("删除(L)     Del"),
					   new MenuItem("查找(F)     Ctrl+F"),
					   new MenuItem("查找下一个    F3"),
					   new MenuItem("替换(R)     Ctrl+H"),
					   new MenuItem("转到(G)     Ctrl+G"),
					   new MenuItem("全选(A)     Ctrl+A"),
					   new MenuItem("时间/日期(D) F5"),
						
	};
	MenuItem[] mi_g = { new MenuItem("自动换行(W)"),
						new MenuItem("字体(F)...")
			
	};
	MenuItem[] mi_g1 = { new MenuItem("---自动换行(W)"),
						 new MenuItem("字体(F)...")
	};
	MenuItem[] mi_v = { new MenuItem("状态栏(S)")};
	MenuItem[] mi_h = { new MenuItem("帮助主题(H)"),
						new MenuItem("关于记事本(A)")
			
	};
	
public	boolean Save( Menu1 f, String name , String path )throws IOException {
		PrintWriter pw = new PrintWriter(new FileWriter(path+name, false));
		String input=f.ta.getText();
		pw.print(input);
		pw.flush();
		pw.close();
		return true;
	}
public boolean Save( Menu1 f ){
	 FileDialog d = new FileDialog(f, 
		        "保存文件",FileDialog.SAVE); 
		      d.setFile("*.*"); 
		      d.setDirectory("."); 
		      d.show(); 
		      String saveFile; 
		      if((saveFile = d.getFile()) != null) {
		    	  f.name = d.getFile();
		    	  f.path = d.getDirectory();
		    	  try{
		    	  Save( f , f.name , f.path );
		    	  } catch ( IOException ie ){
		    		  ie.printStackTrace();
		    	  }
		      }
		     
	return true;
}
	   Menu1(String n,int a,int b,String p,String t){
		this.name = n;
		this.path = p;
		this.txt = t;
	    count++;
	    setTitle(this.name+" - 记事本");
	    setLayout( new BorderLayout());
		for( int x=0 ; x<mi_f.length ; x++ ) f.add( mi_f[x] );
		for(int x=0 ; x <mi_e.length ; x++ ) e.add( mi_e[x] );
		for(int x =0; x<mi_g.length ; x++ ) g.add( mi_g[x] );
		for(int x=0;x<mi_v.length; x++) v.add( mi_v[x] );
		for(int x=0;x<mi_h.length; x++) h.add( mi_h[x] );
		mi_f[4].disable();mi_f[5].disable();
		mi_v[0].disable();
		mi_e[0].disable(); 
		mi_e[8].disable();
		//设置可用性！
		mb.add(f);
		mb.add(e);
		mb.add(g);
		mb.add(v);
		mb.add(h);
		ta.setText(this.txt);
		add(ta);
		setFont(new   Font("宋体",Font.PLAIN,15));
		setMenuBar(mb);  // getMenuBar()
		if(a<0) a=-a;
		if(b<0) b=-b;
		setLocation(0, 0);
		setSize(a,b);  //设置大小可见性，默认无大小。。不可见！
		setVisible(true);  //也可以在下面使用Frame类的静态函数设置
		}
   Menu1(String name,String path){
	   new Menu1(name ,800,600,path,"");
   }
   Menu1(String name , String path ,String txt){
	   new Menu1(name,800,600,path,txt);
   }
   Menu1(String name){
	   new Menu1(name , 800 , 600 ,null,"" );
   }
   Menu1(){
	   new Menu1("无标题",800,600,null,"");
   }
	public boolean handleEvent( Event evt ){
		if( evt.id == Event.WINDOW_DESTROY ) {
			if (count == 1)System.exit(0);
			else {
				count--;
				dispose();
			}
			//上面其实和下面等效！但是从效率而言，上面更高
			
			//dispose();
			
			//dispose() 和System.exit(0)是不同的
			//exit()是退出虚拟机
			//dispose()是释放当前窗口资源
		}
		else return super.handleEvent( evt );
		return true ;
	}
	public boolean action( Event evt , Object obj) {
	    if(evt.target instanceof MenuItem) {
		  	if( obj.equals("自动换行(W)" ) == true ) {
				g.removeAll();
				for(int x =0; x<mi_g1.length ; x++ ) g.add( mi_g1[x] );
			}
			else if( obj.equals("---自动换行(W)")==true  ){
				g.removeAll();
				for(int x =0; x<mi_g.length ; x++ ) g.add( mi_g[x] );
				}
			else if( obj.equals("新建(N)       Ctrl+N")==true) {
				Menu1 x=new Menu1();
				}
			else if( obj.equals("打开(O)       Ctrl+O")) {
				   FileDialog d = new FileDialog(this, 
			      "选择文件打开"); 
			      d.setFile("*.*"); // Filename filter 
			      d.setDirectory("."); // Current directory 
			      d.show(); 
			      String temp;
			      if( ( temp = d.getFile()) != null ){
			    	  name = d.getFile();
			    	  path = d.getDirectory();
			    	  setTitle(this.name+" - 记事本---"+path);
			    	 temp = path+name;
			    	 try{
							BufferedReader br = new BufferedReader(new FileReader(temp));
							temp = br.readLine();
							String result ="";
							while(temp!=null){
								result=result+temp;
								result=result+"\n";
								temp=br.readLine();
								}
							txt = result;
							ta.setText( txt );
			    	 } catch ( IOException e ) {
			    		 e.printStackTrace();
			    	 }
			      }
			}
			else if( obj.equals("保存(S)       Ctrl+S")){
				Frame f= null;
				if( path == null )
				 Save( this );
				else 
					try{
					Save(this,this.name,this.path );
					}catch ( IOException ie) {
						ie.printStackTrace();
					}
			}
			else if(obj.equals("另存为(I)...")){
				Save( this );
				}
			else if( obj.equals("页面设置(U)")){
				
			}
			else if( obj.equals("打印(P)...    Ctrl+p")){
				
			}
			else if( obj.equals("退出(X)")){
				if (count == 1)System.exit(0);
				else {
					count--;
					dispose();
				}
			}
			else if( obj.equals("剪切(T)     Ctrl+X")) {
				String selection = ta.getSelectedText();
				StringSelection clipString = new StringSelection( selection );
				clipbd.setContents( clipString ,  clipString );
				ta.replaceRange( "" , 
						ta.getSelectionStart(),
						ta.getSelectionEnd() );
			}
			else if( obj.equals("复制(C)     Ctrl+C")) {
				String selection = ta.getSelectedText();
				StringSelection clipString = new StringSelection( selection );
				clipbd.setContents( clipString , clipString );
			}
			else if(  obj.equals("粘贴(P)     Ctrl+V")) {
				Transferable clipData = clipbd.getContents(Menu1.this);
				try { 
			        String clipString =  
			          (String)clipData. 
			            getTransferData( 
			              DataFlavor.stringFlavor); 
			        ta.replaceRange(clipString,   
			          ta.getSelectionStart(),  
			          ta.getSelectionEnd()); 
			      } catch(Exception ex) { 
			        System.out.println("not String flavor"); 
			      } 
			    } 
			else if( obj.equals("删除(L)     Del")) {
				ta.replaceRange( "" , 
						ta.getSelectionStart(),
						ta.getSelectionEnd() );
			}
			
			else return super.action(evt , obj);
		 }
		 else return super.action(evt, obj);
		return true;
	}
	public static void main( String[] args ) {
		Menu1 f= new Menu1();
		//f.setForeground(Color.green); 
		//设置控件颜色,当然这需要在设置可见性之前才能起作用！
		//f.setSize(600,300);
		//f.show();
		//Menu1函数已经设置过可见性了
	}
}