import java.io.IOException; import java.io.OutputStream; public class Out { public static void main(String[] args) { //用输出流输出到控制台 OutputStream out=System.out; byte[] b="Hello Java!".getBytes(); try { out.write(b, 0, b.length); out.flush(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }