www.pudn.com > TIJc04.rar > Demotion.java

//: c04:Demotion.java 
// Demotion of primitives and overloading. 
// 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 Demotion { 
  static Test monitor = new Test(); 
  void f1(char x) { System.out.println("f1(char)"); } 
  void f1(byte x) { System.out.println("f1(byte)"); } 
  void f1(short x) { System.out.println("f1(short)"); } 
  void f1(int x) { System.out.println("f1(int)"); } 
  void f1(long x) { System.out.println("f1(long)"); } 
  void f1(float x) { System.out.println("f1(float)"); } 
  void f1(double x) { System.out.println("f1(double)"); } 
 
  void f2(char x) { System.out.println("f2(char)"); } 
  void f2(byte x) { System.out.println("f2(byte)"); } 
  void f2(short x) { System.out.println("f2(short)"); } 
  void f2(int x) { System.out.println("f2(int)"); } 
  void f2(long x) { System.out.println("f2(long)"); } 
  void f2(float x) { System.out.println("f2(float)"); } 
 
  void f3(char x) { System.out.println("f3(char)"); } 
  void f3(byte x) { System.out.println("f3(byte)"); } 
  void f3(short x) { System.out.println("f3(short)"); } 
  void f3(int x) { System.out.println("f3(int)"); } 
  void f3(long x) { System.out.println("f3(long)"); } 
 
  void f4(char x) { System.out.println("f4(char)"); } 
  void f4(byte x) { System.out.println("f4(byte)"); } 
  void f4(short x) { System.out.println("f4(short)"); } 
  void f4(int x) { System.out.println("f4(int)"); } 
 
  void f5(char x) { System.out.println("f5(char)"); } 
  void f5(byte x) { System.out.println("f5(byte)"); } 
  void f5(short x) { System.out.println("f5(short)"); } 
 
  void f6(char x) { System.out.println("f6(char)"); } 
  void f6(byte x) { System.out.println("f6(byte)"); } 
 
  void f7(char x) { System.out.println("f7(char)"); } 
 
  void testDouble() { 
    double x = 0; 
    System.out.println("double argument:"); 
    f1(x);f2((float)x);f3((long)x);f4((int)x); 
    f5((short)x);f6((byte)x);f7((char)x); 
  } 
  public static void main(String[] args) { 
    Demotion p = new Demotion(); 
    p.testDouble(); 
    monitor.expect(new String[] { 
      "double argument:", 
      "f1(double)", 
      "f2(float)", 
      "f3(long)", 
      "f4(int)", 
      "f5(short)", 
      "f6(byte)", 
      "f7(char)" 
    }); 
  } 
} ///:~