stringer.java

Java编程思想这本书很好

//: appendixa:Stringer.java
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import com.bruceeckel.simpletest.*;

public class Stringer {
  private static Test monitor = new Test();
  public static String upcase(String s) {
    return s.toUpperCase();
  }
  public static void main(String[] args) {
    String q = new String("howdy");
    System.out.println(q); // howdy
    String qq = upcase(q);
    System.out.println(qq); // HOWDY
    System.out.println(q); // howdy
    monitor.expect(new String[] {
      "howdy",
      "HOWDY",
      "howdy"
    });
  }
} ///:~