import java.io.*;public class Test {	public static void main(String[] args) {		try {			OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream("C:/java/char.txt"));			osw.write("microsoftibssunapplehp");			System.out.println(osw.getEncoding());//文本编码			osw.close();						//加了true 可以再文件末尾添加			osw = new OutputStreamWriter(new FileOutputStream("C:/java/char.txt", true),"ISO8859_1");			osw.write("microsoftibssunapplehp");			System.out.println(osw.getEncoding());//文本编码			osw.close();		} catch (IOException e) {		}	}}

import java.io.*;public class Test {	public static void main(String[] args) {				InputStreamReader isr = 			new InputStreamReader(System.in);		BufferedReader br = new BufferedReader(isr);				String s = null;				try {			s = br.readLine();			while(s != null) {				if(s.equalsIgnoreCase("exit")) break;				System.out.println(s.toUpperCase());				s = br.readLine();			}			br.close();		} catch (IOException e) {			e.printStackTrace();		}	}}