securityapplet.java

来自「java网络高级编程的配套源码,java网络高级编程为清华出版社出版.」· Java 代码 · 共 98 行

/*源程序清单12-15*/

package safe;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import borland.jbcl.layout.*;
import borland.jbcl.control.*;
import java.lang.Runtime;
import netscape.security.PrivilegeManager;

public class SecurityApplet extends Applet
{
  XYLayout xYLayout1 = new XYLayout();
  boolean isStandalone = false;
  GroupBox groupBox1 = new GroupBox();
  TextField textField1 = new TextField();
  Button button1 = new Button();
  XYLayout xYLayout2 = new XYLayout();

  //Construct the applet
  public SecurityApplet()
  {
  }

  //Initialize the applet
  public void init()
  {
    try
    {
      jbInit();
    }
    catch (Exception e)
    {
      e.printStackTrace();
      }
  }

  //Component initialization
  private void jbInit() throws Exception
  {
    xYLayout1.setWidth(400);
    xYLayout1.setHeight(300);
    groupBox1.setLayout(xYLayout2);
    groupBox1.setLabel("请输入程序路径及名称：");
    button1.setLabel("启动");
    button1.addActionListener(new SecurityApplet_button1_actionAdapter(this));
    this.setLayout(xYLayout1);
    this.add(groupBox1, new XYConstraints(21, 15, 348, 68));
    groupBox1.add(textField1, new XYConstraints(15, 5, 232, -1));
    groupBox1.add(button1, new XYConstraints(256, 6, 61, -1));
  }

  //Get Applet information
  public String getAppletInfo()
  {
    return "Applet Information";
  }

  //Get parameter info
  public String[][] getParameterInfo()
  {
    return null;
  }

  void button1_actionPerformed(ActionEvent e)
  {
    PrivilegeManager.enablePrivilege("UniversalExecAccess");
    try
    {
      String pathname=textField1.getText();
      Runtime runtime=Runtime.getRuntime();
      runtime.exec(pathname);
    }catch(Exception ee)
    {
      MessageDialog mdlg=new MessageDialog(new Frame(),"错误","请确认你所输入的程序路径是否正确？",1);
      mdlg.show();
    }
  }
}

class SecurityApplet_button1_actionAdapter implements java.awt.event.ActionListener
{
  SecurityApplet adaptee;

  SecurityApplet_button1_actionAdapter(SecurityApplet adaptee)
  {
    this.adaptee = adaptee;
  }

  public void actionPerformed(ActionEvent e)
  {
    adaptee.button1_actionPerformed(e);
  }
}