import java.io.FileWriter; 
import java.io.IOException; 
public class TestFile { 
    public static void main(String[] args) { 
        StringBuffer sb=new StringBuffer(); 
        sb.append("12345/n"); 
        sb.append("abcde/n"); 
        sb.append("123.abc"); 
        try { 
            FileWriter fw=new FileWriter("c:/test.txt"); 
            fw.write(sb.toString()); 
            fw.close(); 
        } catch (IOException e) { 
            e.printStackTrace(); 
        } 
    } 
}