memerystream2.java

来自「这是清华大学编写的JAVA教材中所有题目的源代码！」· Java 代码 · 共 38 行

import java.io.*;

class MemeryStream2
{
	public static void main(String args[])
	{
		String s="abcdefghijklmnopqrstuvwxyz";
		char[] src=new char[s.length()];
	    s.getChars(0,s.length(),src,0);

		CharArrayReader in = new CharArrayReader(src);
		CharArrayWriter out = new CharArrayWriter();
		transform(in,out);

		char[] result=out.toCharArray();
		String t=String.copyValueOf(result);
		System.out.println(t);
	}
	
	public static void transform(Reader in,Writer out)
	{
		int c=0;

		try
		{
			while((c=in.read())!=-1)
			{
				c=Character.toUpperCase((char)c);
				out.write(c);
			}
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}
}