// 運用PrintWriter類輸出基本數(shù)據(jù)類型數(shù)據(jù)
import java.io.*;
public class PrintWriterDemo {
  public static void main(String args[]) {
    PrintWriter oPW = new PrintWriter(System.out, true);
    oPW.println("Output a string");
    int i = -9;
    oPW.println(i);
    double d = 4.5e-7;
    oPW.println(d);
	boolean t=true;
	oPW.println(t);
  }
}