Master/Reference Architectures and Patterns/hjp5/examples/Listing4306.java


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/* Listing4306.java */

import java.lang.reflect.*;

public class Listing4306
{
  public static void main(String[] args)
  {
    Class clazz = TestConstructors.class;
    //Formale Parameter definieren
    Class[] formparas = new Class[2];
    formparas[0] = String.class;
    formparas[1] = String.class;
    try {
      Constructor cons = clazz.getConstructor(formparas);
      //Aktuelle Argumente definieren
      Object[] actargs = new Object[] {"eins", "zwei"};
      Object obj = cons.newInstance(actargs);
      ((TestConstructors)obj).print();
    } catch (Exception e) {
      System.err.println(e.toString());
      System.exit(1);
    }
  }
}

class TestConstructors
{
  private String arg1;
  private String arg2;

  public TestConstructors()
  {
    arg1 = "leer";
    arg2 = "leer";
  }

  public TestConstructors(String arg1)
  {
    this();
    this.arg1 = arg1;
  }

  public TestConstructors(String arg1, String arg2)
  {
    this();
    this.arg1 = arg1;
    this.arg2 = arg2;
  }

  public void print()
  {
    System.out.println("arg1 = " + arg1);
    System.out.println("arg2 = " + arg2);
  }
}