記事本java

1. 使用記事本編寫java程序,並運行輸出結果,具體的實現步驟是什麼

1、首先在電腦中新建一個記事本，將記事本的後綴改為「.java」，如下圖所示。

2. 如何使用記事本編寫java程序

很簡單的啊，在記事本里寫上相應的java代碼，寫好保存後將相應的文件名後綴改為****.java，然後用CMD去編譯一下就可以了。

具體流程是這樣的：

然後就可以去CMD那裡編譯和運行了。

在華信智原的JAVA課堂裡面第一節課就會講到這個基礎的知識。

3. 用JAVA編個簡單的記事本程序

import java.awt.event.*;
import java.awt.*;
import java.io.*;
import java.util.Calendar;
import java.util.Date;
import javax.swing.*;

class Editor extends Frame implements ActionListener,ItemListener
{
// Date date=new Date();
int n1;String str="";int k=0;String st1,st2;
JTextArea ta=new JTextArea(50,50);
Dialog dialog,dialog1;
Choice ce1,ce2,ce3;
Button btn1,btn2,btn3;Panel p1=new Panel();
Panel p2=new Panel();Panel p3=new Panel();Panel p4=new Panel();
public Editor (String s)
{
super ("記事本編輯板");
ImageIcon YouImg = new ImageIcon("iconimage.jpg");
setIconImage(YouImg.getImage());

addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
dispose();
System.exit(0);
}

});
setBounds(50,35,700,500);

MenuBar mb=new MenuBar();
setMenuBar(mb);
Menu file=new Menu("文件(F)");Menu edit=new Menu("編輯(E)");Menu help=new Menu("幫助(H)");
Menu pattern=new Menu("格式(P)");Menu time=new Menu("時間(T)");
MenuItem exit=new MenuItem("退出",new MenuShortcut(KeyEvent.VK_Q));
MenuItem tdate=new MenuItem("日期/時間",new MenuShortcut(KeyEvent.VK_D));
MenuItem renew=new MenuItem("新建", new MenuShortcut(KeyEvent.VK_N));
MenuItem save=new MenuItem("保存", new MenuShortcut(KeyEvent.VK_S));
MenuItem open=new MenuItem("打開",new MenuShortcut(KeyEvent.VK_O));
MenuItem =new MenuItem("復制",new MenuShortcut(KeyEvent.VK_C));
MenuItem paste=new MenuItem("粘貼",new MenuShortcut(KeyEvent.VK_V));
MenuItem cut=new MenuItem("剪切",new MenuShortcut(KeyEvent.VK_X));
MenuItem helptopic=new MenuItem("主題",new MenuShortcut(KeyEvent.VK_T));
helptopic.addActionListener(this);
dialog=new Dialog(this, "字體設置");dialog.setSize(300,300);
dialog1=new Dialog(this, "幫助主題");dialog1.setBounds(250,100,300,400);
dialog.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
dialog.setVisible(false);}
});
dialog1.addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
dialog1.setVisible(false);}
});
//dialog.setBackground(Color.WHITE);
dialog.setLayout(null);dialog.setBounds(170,150,450,300);
Label L1=new Label("字體(F)");Label L2=new Label("字形(Y)");
Label L3=new Label("大小(S)");TextArea ta1=new TextArea(5,5);
ta1=new TextArea("至於記事本的主題嘛，因為本人的水平有限, 所有不能為大家作過多的指導，望大家見諒！"); //在這里我想加一個文本框用來放幫助信息。

ce1=new Choice();ce2=new Choice();
ce3=new Choice();
btn1=new Button("確定");btn2=new Button("取消");btn1.addActionListener(this);btn2.addActionListener(this);
btn3=new Button("顏色");
btn3.addActionListener(this);

ce1.add("華文行楷");ce1.add("華文中宋");ce1.add("華文新魏");ce1.add("華文細黑");ce1.add("宋體");ce1.add("方正姚體");
ce1.add("幼圓");ce1.add("隸書");ce1.add("楷體-GB2312");ce1.add("華文行楷");ce1.add("華文彩雲");ce1.add("仿宋-GB2312");
ce2.add("粗體");ce2.add("斜體");ce2.add("常規");
for(int n1=0;n1<=100;n1++)
{ce3.add(""+n1);}
dialog.add(p1);p1.setBounds(5,30,440,35);p1.setLayout( null);//p1.setBackground(Color.red);
dialog.add(p2);p2.setBounds(5,65,440,27);dialog.add(p3);p3.setBounds(5,90,440,40);//p4.setBounds(5,120,440,138);
p1.setLayout( null);
p1.add(L1);L1.setBounds(5,15,50,25);p1.add(L2);L2.setBounds(150,15,50,25);
p1.add(L3);L3.setBounds(250,15,50,25);p2.setLayout( null);//p2.setBackground(Color.yellow);
p2.add(ce1);ce1.setBounds(5,0,130,25);p2.add(ce2);ce2.setBounds(160,0,90,25);p2.add(ce3);ce3.setBounds(260,0,75,25);
p2.add(btn1);btn1.setBounds(360,0,75,25);
p3.setLayout( null);p3.add(btn2);btn2.setBounds(360,10,75,25);p3.add(btn3);btn3.setBounds(160,10,75,25);
dialog.add(p4);p4.setBackground(Color.yellow);p4.setBounds(5,120,440,138);
dialog1.add(ta1);
//設置字體的下拉情況
MenuItem Font=new MenuItem("字體");//給字體加監聽器
Font.addActionListener(this);
MenuItem Replace=new MenuItem("替換"); MenuItem Seek=new MenuItem("查找");
//首要添加組件的情況
mb.add(file);mb.add(edit);mb.add(pattern);mb.add(time);mb.add(help);
file.add(renew);file.addSeparator();file.add(open);time.add(tdate);
file.addSeparator(); file.add(exit);file.addSeparator();file.add(save);
edit.add(); edit.addSeparator();edit.add(paste);edit.addSeparator();edit.add(cut);
pattern.add(Font); pattern.add(Replace);
pattern.add(Seek);help.add(helptopic);
//給必要的組件加上監聽器
renew.addActionListener( this);tdate.addActionListener(this);
open.addActionListener(this); save.addActionListener(this);exit.addActionListener(this);
cut.addActionListener(this);.addActionListener(this);paste.addActionListener(this);
ce1.addItemListener(this);ce2.addItemListener(this);ce3.addItemListener(this);
//添加必要的組件
add(ta,"Center");ta.setBackground(new Color(249,255,234));
setSize(700,500);
setVisible(true);
this.validate() ;

}

public void itemStateChanged(ItemEvent e) {
if (ce2.getSelectedItem().equals("粗體"))
{ k=1;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}
if (ce2.getSelectedItem().equals("斜體"))
{ k=2;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}
if (ce2.getSelectedItem().equals("常規"))
{ k=3;st1=ce1.getSelectedItem();st2=ce3.getSelectedItem();}
}

public void actionPerformed(ActionEvent e)
{
if(e.getActionCommand().equals("新建"))
{System.out.println("new ");
ta.setText("");}
if(e.getActionCommand().equals("退出"))
{ System.exit(0);}
try
{
if(e.getActionCommand().equals("打開"))
openText();
if(e.getActionCommand().equals("保存"))
saveText();
}catch(IOException e1){}
if(e.getActionCommand().equals("復制"))
{ str=ta.getSelectedText();}
if(e.getActionCommand().equals("粘貼"))
{ ta.insert(str,ta.getCaretPosition());}
if(e.getActionCommand().equals("剪切"))
{str=ta.getSelectedText();ta.replaceRange("",ta.getSelectionStart(),ta.getSelectionEnd());

}
if(e.getActionCommand().equals("字體"))
{dialog.setVisible(true);}
if(e.getActionCommand().equals("主題"))
{dialog1.setVisible(true);}
if(e.getActionCommand().equals("顏色"))
{
Color clr=JColorChooser.showDialog(this,"顏色對話框",null);
ta.setForeground(clr);
}

if(e.getSource()==btn2)
dialog.setVisible(false);
if(e.getSource()==btn1)
{
if(k==1)
{ ta.setFont(new Font(st1,Font.BOLD,Integer.parseInt(st2)));}
if(k==2)
{ ta.setFont(new Font(st1,Font.ITALIC,Integer.parseInt(st2)));}
if(k==3)
{ ta.setFont(new Font(st1,Font.PLAIN,Integer.parseInt(st2)));}
dialog.setVisible(false);
}

//if (e.getActionCommand().equals("日期/時間"))
//ta.setText(ta.getText()+""+date);
if(e.getActionCommand().equals("日期/時間"))
{
Calendar c1 =Calendar.getInstance();
int y = c1.get(Calendar.YEAR);
int m = c1.get(Calendar.MONTH);
int d = c1.get(Calendar.DATE);
int h = c1.get(Calendar.HOUR);
int m1 = c1.get(Calendar.MINUTE);
int m2 = m+1;
ta.setText(ta.getText()+""+(y+"年"+m2+"月"+d+"日"+h+":"+m1));
}

}

public void openText() throws IOException
{
FileDialog fd=new FileDialog(this,"打開文件對話框",FileDialog.LOAD);
fd.setVisible(true);FileInputStream fis=new FileInputStream(fd.getDirectory()+fd.getFile());
ta.setText("");
int n=0;
while((n=fis.read())!=-1)
ta.append(""+(char)n);
fis.close();
}
public void saveText() throws IOException
{
FileDialog fd=new FileDialog(this,"打開文件對話框",FileDialog.SAVE);
fd.setVisible(true);
FileOutputStream out=new FileOutputStream(fd.getDirectory()+fd.getFile()+".txt");
String str=ta.getText();

String str1=ta.getText();
for(int n=0;n<str.length();n++)
out.write((byte)str.charAt(n));
out.close();
}

public static void main(String[] args)
{
Editor f=new Editor(" 記事本程序");
//添加時間代碼
Date date=new Date();
System.out.print(date);
/*Calendar now=Calendar.getInstance();
int year=now.get(Calendar.YEAR);
int month=now.get(Calendar.MONTH)+1;
int day=now.get(Calendar.DATE);
System.out.print(year+"年"+month+"月"+day+"日");

int week=now.get(Calendar.DAY_OF_WEEK);
String str="日一二三四五六";//星期1-7
int i=2*(week-1);
System.out.println("星期"+str.substring(i,i+2));//對應中文的下標*/

}

class dialog extends Dialog
{

public dialog()
{
super(dialog, "字體設置");

class Mycanvas extends Canvas
{
Toolkit tk;
Image img;
Mycanvas()
{
setSize(440,138);
tk=getToolkit();
img=tk.getImage("photo.jpg");
}
public void paint(Graphics g)
{
g.drawImage(img,5,120,440,138,this);
}
}
}
}
}