applet1.java

在JAVA的APPLET中如何实现图片显示.

package picture;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.awt.event.*;
import java.awt.image.ImageObserver;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.net.*;
import java.io.*;
import java.util.*; //vector Class
import java.lang.Thread.*;
import java.awt.image.BufferedImage;
import java.awt.Graphics2D.*;
import java.awt.geom.Line2D;
import java.lang.Thread.*;



/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class Applet1 extends Applet {
  private boolean isStandalone = false;
  Image backImage;
  int backImageWeith;
  int backImageHeight;
  URL chatURL;
  JButton jButton1 = new JButton();
  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }

  //Construct the applet
  public Applet1() {
  }
  //Initialize the applet
  public void init() {
    try {
       chatURL = new URL("http://127.0.0.1:8080/");

      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    jButton1.setBounds(new Rectangle(11, 4, 75, 33));
    jButton1.setText("wjy");
    jButton1.addMouseListener(new Applet1_jButton1_mouseAdapter(this));
    this.setLayout(null);
    this.add(jButton1, null);
  }
  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }
  //Get parameter info
  public String[][] getParameterInfo() {
    return null;
  }

  void jButton1_mouseClicked(MouseEvent e) {
    backImage = this.getImage(chatURL,
                              "916试验点分布图.gif");
    do {
      backImageWeith = backImage.getWidth(null);
      backImageHeight = backImage.getHeight(null);
    }
    while (backImageWeith == -1 || backImageHeight == -1);
    Graphics g;
    g=this.getGraphics();
    //g.drawImage(backImage, 0, 0, backImageWeith, backImageHeight, null);
int     dx1 = 200;//xinodes[i].pointX;
int dy1 = 100;//xinodes[i].pointY;
int dx2 =250;// xinodes[i].pointX + xinodes[i].iconWidth / xinodes[i].iconNum;
int dy2 =150;// xinodes[i].pointY + xinodes[i].iconHeight;
int sx1 =200;// xinodes[i].nodeState * xinodes[i].iconWidth /
    //xinodes[i].iconNum;
int sy1 = 0;
int sx2 =300;// (xinodes[i].nodeState + 1) * xinodes[i].iconWidth /
    //xinodes[i].iconNum;
int sy2 = 200;
g.drawImage(backImage, dx1, dy1, dx2, dy2, sx1, sy1, sx2,
            sy2, null);

    //g.drawImage(backImage, 0, 0, backImageWeith, backImageHeight, null);
  } //endif




  }


class Applet1_jButton1_mouseAdapter extends java.awt.event.MouseAdapter {
  Applet1 adaptee;

  Applet1_jButton1_mouseAdapter(Applet1 adaptee) {
    this.adaptee = adaptee;
  }
  public void mouseClicked(MouseEvent e) {
    adaptee.jButton1_mouseClicked(e);
  }
}