怎么用java语言编写一个保存文件程序 使用Java语言编写的源程序保存时的文件扩展名是什么
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\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-Java
import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class Example10_9
{
public static void main(String args[])
{
FileWindows win = new FileWindows();
}
}
class FileWindows extends Frame implements ActionListener
{
FileDialog filedialog_save,filedialog_load;
MenuBar menubar;
Menu menu;
MenuItem itemOpen,itemSave;
TextArea text;
BufferedReader in;
FileReader file_reader;
BufferedWriter out;
FileWriter file_writer;
FileWindows()
{
super("A window with a file");
setSize(260,270);
setVisible(true);
menubar = new MenuBar();
menu = new Menu("File");
itemOpen = new MenuItem("Open file");
itemSave = new MenuItem("Save file");
itemOpen.addActionListener(this);
itemSave.addActionListener(this);
menu.add(itemOpen);
menu.add(itemSave);
menubar.add(menu);
setMenuBar(menubar);
filedialog_save = new FileDialog(this,"Save file dailog",FileDialog.SAVE);
filedialog_load = new FileDialog(this,"Open file dialog",FileDialog.LOAD);
filedialog_save.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
filedialog_save.setVisible(false);
}
});
filedialog_load.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
filedialog_load.setVisible(false);
}
});
addWindowListener(new WindowAdapter()
{
public void WindowAdapter(WindowEvent e)
{
System.exit(0);
}
});
text = new TextArea(10,10);
add(text,BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==itemOpen)
{
filedialog_load.setVisible(true);
text.setText(null);
String s;
if(filedialog_load.getFile()!=null)
{
try{
File file = new File (filedialog_load.getDirectory(),filedialog_load.getFile());
file_reader = new FileReader(file);
in = new BufferedReader(file_reader);
while((s = in.readLine())!=null)
{
text.append(s+'\n');
}
in.close();
file_reader.close();
}
catch(IOException e2)
{
}
}
}
else if(e.getSource()==itemSave)
{
filedialog_save.setVisible(true);
if(filedialog_save.getFile()!=null)
{
try{
File file = new File(filedialog_save.getDirectory(),filedialog_save.getFile());
file_writer = new FileWriter(file);
out = new BufferedWriter(file_writer);
out.write(text.getText(),0,(text.getText()).length());
out.close();
file_writer.close();
}
catch(IOException e2)
{
}
}
}
}
}
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绛旓細aString = new String(data.getBytes(),"UTF-8");printWriter.write(aString+"\n");} bReader.close();iReader.close();fInputStream.close();printWriter.close();outputStreamWriter.close();fOutputStream.close();} } 缁欎釜浠ｇ爜鍙傝冧笅鍚э紝浣犳墦寮out.txt鐪嬭涓閮ㄥ垎姝ｅ父锛屼竴閮ㄥ垎涔辩爜灏卞浜 ...
绛旓細閲囩敤java璇█缂栧啓涓涓璁＄畻鍣,璇ヨ绠楀櫒鑳藉姝ｆ暟銆佽礋鏁(杩欓噷鐨勬鏁般佽礋鏁板寘鎷皬鏁)杩涜鍔犮佸噺銆佷箻銆侀櫎杩 鎴戞潵绛 3涓洖绛 #鐑# 缃戞枃璐ㄩ噺鏄笉鏄笅闄嶄簡?cykxwx 2010-06-08 路 TA鑾峰緱瓒呰繃221涓禐 鐭ラ亾绛斾富 鍥炵瓟閲:109 閲囩撼鐜:0% 甯姪鐨勪汉:41涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 ...
绛旓細class Person{ private String name;private int age;public Person(String name,int age){ this.name=name;this.age=age;} public void setName(String name){ this.name=name;} public void setAge(int age){ this.age=age;} public String getName(){ return this.name;} public int get...
绛旓細浣犲緱鍏堟煡鐪媠ina寰崥绌洪棿鐨勭敤鎴锋棩蹇楅〉闈㈢殑婧愪唬鐮佷互鍙婄敤姝ｅ垯琛ㄨ揪寮忚〃绀哄畠閫氶厤鐨刄RL锛岃繖鏍蜂綘灏卞彲浠ユ姄鍙栧埌浣犳兂瑕佺殑涓滆タ浜嗭紝鎴戣繖杈瑰仛浜涓涓鎶撳彇sina锛岀綉鏄擄紝yahoo缃戠珯涓婄殑鏂伴椈璧勮锛岄渶瑕佺粰鎴戝彂閭欢锛屾垜閭锛歽[email protected]
绛旓細k=0; //淇濆瓨鍚勪綅涓婄殑鏁癷nt t=0; //淇濆瓨鏁板瓧涓暟 for(i=1;i<=4;i++)锝 for(j=1;j<=4;j++)锝 for(k=1;k<=4;k++){if(i!=j && j!=k && i!=k){ t+=1;System.out.println(i*100+j*10+k);} } } }System.out.println (t);...
绛旓細Java鏄竴闂ㄨ绠楁満缂栫▼璇█锛岄潰鍚戝璞＄殑缂栫▼璇█銆侸ava鍙互寮鍙戝悗绔紝鏈塻pring锛宻pringmvc锛宻pringboot锛宻pringcould绛夌瓑閮芥槸浣跨敤Java寮鍙戙侸ava涔熸湁鍓嶇妗嗘灦锛屾湁Jquery锛孞avaScript锛孞SP锛孲ervlet锛岀粺绉癑avaWEB寮鍙戙浣跨敤Java缂栧啓涓涓绋嬪簭寰堢畝鍗曪紝鎸夌収鐩稿叧鐨勬ā鏉匡紝鍔犱笂涓氬姟浠ｇ爜灏卞彲浠ュ疄鐜颁竴濂楃郴缁熴
绛旓細Scanner input = new Scanner( System.in );int number1;int number2;int number3;int number4;int number5;System.out.print( "Enter first integer: " );number1 = input.nextInt();System.out.print( "Enter second integer: " );number2 = input.nextInt();System.out.print( "Enter ...
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绛旓細out.println(ch + "锛歕\u" + Integer.toHexString(ch));}try (Scanner in = new Scanner(System.in)) {System.out.print("杈撳叆涓涓鏁存暟锛");int n = in.nextInt();for (char ch : chars) {char anotherChar = (char) (ch + n);System.out.println(anotherChar);}}}杩愯锛
