mybeanintrospector.java

来自「j2ee关于BEANS的多个例子」· Java 代码 · 共 61 行

import java.beans.*;
import javax.swing.*;

public class MyBeanIntroSpector extends JPanel
{
	JLabel lab;
	JTextArea txt;
	JFrame frm;
	
	Test tObj=new Test();
	
	public MyBeanIntroSpector()
	{
		frm=new JFrame("Bean info");
		frm.getContentPane().add(this);
		String mName;
		lab=new JLabel("bean 内部信息:");
		txt=new JTextArea(10,10);
		add(lab);
		add(txt);
		try
		{
			BeanInfo bi=Introspector.getBeanInfo(tObj.getClass(),tObj.getClass().getSuperclass());
			
			MethodDescriptor[] md=bi.getMethodDescriptors();
			
			for (int i = 0;i<md.length;i++)
			{
				mName = md[i].getName()+"(";
				
				Class[] pd= md[i].getMethod().getParameterTypes();
				if (pd!=null)
				{
		//			System.out.println("A:"+pd.length);
					
					for (int j=0;j<pd.length;j++)
					{
						mName=mName+pd[j].getName()+",";
					}
					if (pd.length>0)
						mName=mName.substring(0,mName.length()-1);
				}
				mName=mName+")";
				txt.append(mName);
				txt.append("\n");
			}
	 	}
	 	catch(Exception e)
	 	{
	 		System.out.println(e);
	 	}
	 	
	 	frm.setSize(400,400);
	 	frm.setVisible(true);
	}
	
	public static void main(String args[])
	{
		new MyBeanIntroSpector();
	}
}