涓錛庡湪 JDK 1.0 涓紝閫氬父鏄敤 InputStream & OutputStream 榪欎袱涓熀綾繪潵榪涜璇誨啓鎿嶄綔鐨勩?BR>InputStream 涓殑 FileInputStream 綾諱技涓涓枃浠跺彞鏌勶紝閫氳繃瀹冩潵瀵規枃浠惰繘琛屾搷浣滐紝綾諱技鐨勶紝鍦?
OutputStream 涓垜浠湁 FileOutputStream 榪欎釜瀵硅薄銆?BR>
鐢‵ileInputStream 鏉ヨ鍙栨暟鎹殑甯哥敤鏂規硶鏄細
FileInputStream fstream = new FileInputStream(args[0]);
DataInputStream in = new DataInputStream(fstream);
鐢?in.readLine() 鏉ュ緱鍒版暟鎹紝鐒跺悗鐢?in.close() 鍏抽棴杈撳叆嫻併?BR>瀹屾暣浠ｇ爜瑙?Example 1銆?BR>
鐢‵ileOutputStream 鏉ュ啓鍏ユ暟鎹殑甯哥敤鏂規硶鏄細
FileOutputStream out out = new FileOutputStream("myfile.txt");
PrintStream p = new PrintStream( out );
鐢?p.println() 鏉ュ啓鍏ユ暟鎹紝鐒跺悗鐢?p.close() 鍏抽棴杈撳叆銆?BR>瀹屾暣浠ｇ爜瑙?Example 2銆?BR>
浜岋紟鍦?JDK 1.1涓紝鏀寔涓や釜鏂扮殑瀵硅薄 Reader & Writer, 瀹冧滑鍙兘鐢ㄦ潵瀵規枃鏈枃浠惰繘琛屾搷浣滐紝鑰?
JDK1.1涓殑 InputStream & OutputStream 鍙互瀵規枃鏈枃浠舵垨浜岃繘鍒舵枃浠惰繘琛屾搷浣溿?BR>
鐢‵ileReader 鏉ヨ鍙栨枃浠剁殑甯哥敤鏂規硶鏄細
FileReader fr = new FileReader("mydata.txt");
BufferedReader br = new BufferedReader(fr);
鐢?br.readLing() 鏉ヨ鍑烘暟鎹紝鐒跺悗鐢╞r.close() 鍏抽棴緙撳瓨錛岀敤fr.close() 鍏抽棴鏂囦歡銆?BR>瀹屾暣浠ｇ爜瑙?Example 3銆?
鐢?FileWriter 鏉ュ啓鍏ユ枃浠剁殑甯哥敤鏂規硶鏄細
FileWriter fw = new FileWriter("mydata.txt");
PrintWriter out = new PrintWriter(fw);
鍦ㄧ敤out.print 鎴?out.println 鏉ュ線鏂囦歡涓啓鍏ユ暟鎹紝out.print 鍜?out.println鐨勫敮涓鍖哄埆鏄悗鑰呭啓
鍏ユ暟鎹垨浼氳嚜鍔ㄥ紑涓鏂拌銆傚啓瀹屽悗瑕佽寰?鐢╫ut.close() 鍏抽棴杈撳嚭錛岀敤fw.close() 鍏抽棴鏂囦歡銆?nbsp;
瀹屾暣浠ｇ爜瑙?Example 4銆?BR>
-------------------------------------------------------------- following is the source code of examples------------------------------------------------------
Example 1:// FileInputDemo// Demonstrates FileInputStream and DataInputStreamimport java.io.*;
class FileInputDemo 
{
public static void main(String args[]) {
// args.length is equivalent to argc in C if (args.length == 1) { try { // Open the file that is the first command line parameter FileInputStream fstream = new FileInputStream(args[0]); // Convert our input stream to a DataInputStream DataInputStream in = new DataInputStream(fstream); // Continue to read lines while there are still some left to read while (in.available() !=0) { // Print file line to screen System.out.println (in.readLine());
} in.close(); } catch (Exception e) { System.err.println("File input error"); } } else System.out.println("Invalid parameters"); }
}Example 2:
// FileOutputDemo// Demonstration of FileOutputStream and PrintStream classesimport java.io.*;class FileOutputDemo { public static void main(String args[]) { FileOutputStream out; // declare a file output object PrintStream p; // declare a print stream objecttry { // connected to "myfile.txt" out = new FileOutputStream("myfile.txt"); // Connect print stream to the output stream p = new PrintStream( out ); p.println ("This is written to a file"); p.close(); } catch (Exception e) { System.err.println ("Error writing to file"); } }}Example 3:
// FileReadTest.java// User FileReader in JDK1.1 to read a file import java.io.*;class FileReadTest { public static void main (String[] args) { FileReadTest t = new FileReadTest(); t.readMyFile();} void readMyFile() { String record = null; int recCount = 0; try { FileReader fr = new FileReader("mydata.txt"); BufferedReader br = new BufferedReader(fr); record = new String(); while ((record = br.readLine()) != null) { recCount++; System.out.println(recCount + ": " + record); }br.close();fr.close(); } catch (IOException e) { System.out.println("Uh oh, got an IOException error!"); e.printStackTrace(); }} } Example 4:
// FileWriteTest.java// User FileWriter in JDK1.1 to writer a file import java.io.*;class FileWriteTest { public static void main (String[] args) { FileWriteTest t = new FileWriteTest(); t.WriteMyFile();} void WriteMyFile() { try { FileWriter fw = new FileWriter("mydata.txt");PrintWriter out = new PrintWriter(fw); out.print(鈥渉i,this will be wirte into the file!鈥?; out.close();fw.close(); } catch (IOException e) { System.out.println("Uh oh, got an IOException error!"); e.printStackTrace(); }} } ]]>