baisdemo.java

Java语言是目前最流行

//ByteArrayinputStream
import java.io.*;

class BAISDemo
{
	public static void main(String[] args) throws IOException
	{
		String tmp = "china";
		byte b[] = tmp.getBytes();
		ByteArrayInputStream in = new ByteArrayInputStream(b);
		for(int i=0;i<2;i++)
		{
			int c;
			while((c=in.read())!=-1)
			{
				if (i==0)
				{
					System.out.print((char)c);	
				}	
				else
				{
					System.out.print(Character.toUpperCase((char)c));	
				}
			}	
			System.out.println();
			in.reset();
		}	
	}	
}