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  1. package Blatt18;
  2.  
  3. import java.io.*;
  4.  
  5. public class ToUpperCaseWriter extends Writer{
  6.  
  7.     Writer os;
  8.    
  9.     public ToUpperCaseWriter(Writer os){
  10.         this.os = os;
  11.     }
  12.     public void write(char c) throws IOException {
  13.         os.write(Character.toUpperCase(c));
  14.     }
  15.     public void write(char[] cbuf, int off, int len) throws IOException {
  16.         for(int i = off; i < off + len; i++)
  17.             write(cbuf[i]);
  18.     }
  19.     public void write(String str, int off, int len) throws IOException
  20.     {
  21.         for (int i = off; i < off + len; i++)
  22.             write(str.charAt(i));
  23.     }
  24.  
  25.     //alle (relevanten) Methoden von Writer ├╝berschreiben
  26.     public void flush() throws IOException
  27.     {
  28.         os.flush();
  29.     }
  30.     public void close() throws IOException
  31.     {
  32.         os.close();
  33.     }
  34. }
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