backfromthedead.java

learning java的源代码。书中每个实例都有相关的代码example。

//file: BackFromTheDead.java
import java.awt.Component;
import javax.swing.*;
import java.beans.*;

public class BackFromTheDead extends JFrame {

  public BackFromTheDead(  ) {
    super("Revived Beans!");
    try {
      Object bean = Beans.instantiate(
        getClass().getClassLoader(  ), "tipcalc" );

      if ( Beans.isInstanceOf(bean, Component.class) ) {
        Component comp = (Component)
          Beans.getInstanceOf(bean, Component.class);
        getContentPane(  ).add("Center", comp);
      } else {
          System.out.println("Bean is not a Component...");
      }
    }

    catch ( java.io.IOException e1 ) {
      System.out.println("Error loading the serialized object");
    }

    catch ( ClassNotFoundException e2 ) {
      System.out.println(
         "Can't find the class that goes with the object");
    }
  }

  public static void main(String [] args) {
    JFrame f = new BackFromTheDead(  );
    f.pack(  );
    f.setVisible(true);
  }
}