📄 interruptframe.html

📁 think in java TIJ-3rd-edition-code.zip

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<html><head><title>Display page for Interrupt at www.BruceEckel.com</title></head><FONT FACE="Verdana,Tahoma,Arial,Helvetica,Sans"><H2>Interrupt.java</H2><hr></FONT>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
    width="200" height="100" align="baseline"
    codebase="http://java.sun.com/products/plugin/1.2.2/jinstall-1_2_2-win.cab#Version=1,2,2,0">
<PARAM NAME="code" VALUE="Interrupt.class">
<PARAM NAME="codebase" VALUE=".">
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.2.2">
<COMMENT>
    <EMBED type="application/x-java-applet;version=1.2.2" 
       width="200" height="100" align="baseline" 
       code="Interrupt.class" 
       codebase="."
       pluginspage="http://java.sun.com/products/plugin/1.2/plugin-install.html">
    <NOEMBED>
    </COMMENT>
       No Java 2 support for APPLET!!
    </NOEMBED></EMBED>
</OBJECT>
<FONT SIZE="+3"><PRE><B>
//: c14:Interrupt.java
// The alternative approach to using 
// stop() when a thread is blocked.
// &lt;applet code=Interrupt width=200 height=100&gt;
// &lt;/applet&gt;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import com.bruceeckel.swing.*;

class Blocked extends Thread {
  public synchronized void run() {
    try {
      wait(); // Blocks
    } catch(InterruptedException e) {
      System.err.println("Interrupted");
    }
    System.out.println("Exiting run()");
  }
}

public class Interrupt extends JApplet {
  private JButton 
    interrupt = new JButton("Interrupt");
  private Blocked blocked = new Blocked();
  public void init() {
    Container cp = getContentPane();
    cp.setLayout(new FlowLayout());
    cp.add(interrupt);
    interrupt.addActionListener(
      new ActionListener() {
        public 
        void actionPerformed(ActionEvent e) {
          System.out.println("Button pressed");
          if(blocked == null) return;
          Thread remove = blocked;
          blocked = null; // to release it
          remove.interrupt();
        }
      });
    blocked.start();
  }
  public static void main(String[] args) {
    Console.run(new Interrupt(), 200, 100);
  }
} ///:~
</B></PRE></FONT></body></html>

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