Java tutorial
import java.io.BufferedWriter; import java.io.IOException; import java.io.StringWriter; public class Main { public static void main(String[] args) throws IOException { StringWriter sw = new StringWriter(); BufferedWriter bw = new BufferedWriter(sw); for (int i = 65; i <= 90; i++) { bw.write(i); } bw.flush(); StringBuffer sb = sw.getBuffer(); System.out.println(sb); } }