java 反射代码,Java代码库,德仔网

代码语言
代码分类
【Java】 java 反射
作者:锦湖 / 发布于2014/7/1/ 700
获取类的信息, 将信息输出到UI

	package com.reflect;

	import java.lang.reflect.Constructor;
	import java.lang.reflect.Field;
	import java.lang.reflect.Method;
	import java.lang.reflect.Modifier;

	import javax.swing.JFrame;
	import javax.swing.JOptionPane;
	import javax.swing.JTextArea;

	/**
	*
	* This program uses reflection to all information of a class
	*
	* @version 2014-7-1
	*
	*/

	@SuppressWarnings("rawtypes")
	public class Reflect {

	private JTextArea textArea;
	private JFrame frame;

	public void link_frame(Reflect_UI frame) {
	 this.frame = frame;
	 this.textArea = frame.getTextArea();
	}

	public void EnterClassName(String className) {
	 try {
	 Class c = Class.forName(className);

	 printClass(c);

	 textArea.append("\n{\n");

	 textArea.append("\n// fields\n");
	 printFields(c);

	 textArea.append("\n// constructors\n");
	 printConstructors(c);

	 textArea.append("\n//methods \n");
	 printMethods(c);

	 textArea.append("\n}\n");
	 } catch (ClassNotFoundException e) {
	 e.printStackTrace();
	 JOptionPane.showMessageDialog(frame, "ClassNotFoundException");
	 }

	}

	// print Class
	private void printClass(Class c) {

	 Class superC = c.getSuperclass();

	 // print modifiers of class
	 textArea.append(Modifier.toString(c.getModifiers()) + " " + "class ");
	 textArea.append(c.getName() + " ");

	 // "superC!=null" 对于Object类
	 if (superC != null && superC != Object.class) {
	 textArea.append("extends " + superC.getName());
	 }

	}

	// print DeclaredFields
	private void printFields(Class c) {
	 Field[] fields = c.getDeclaredFields();

	 for (Field f : fields) {

	 textArea.append(Modifier.toString(f.getModifiers()) + " "
	 + f.getType().getName() + " " + f.getName() + "\n");
	 }
	}

	// print DeclaredConstructors
	private void printConstructors(Class c) {
	 Constructor[] constructors = c.getDeclaredConstructors();

	 for (Constructor con : constructors) {

	 textArea.append(Modifier.toString(con.getModifiers()) + " "
	 + con.getName() + " (");
	 int i = 0;
	 for (Class par : con.getParameterTypes()) {
	 if (i > 0)
	 textArea.append(", ");
	 textArea.append(par.getTypeName());
	 i++;
	 }
	 textArea.append(")\n");
	 }
	}

	// print DeclaredMethods
	private void printMethods(Class c) {
	 Method[] methods = c.getDeclaredMethods();

	 for (Method m : methods) {

	 textArea.append(Modifier.toString(m.getModifiers()) + " "
	 + m.getReturnType().getName() + " " + m.getName() + " (");

	 int i = 0;
	 for (Class par : m.getParameterTypes()) {
	 if (i > 0)
	 textArea.append(", ");
	 textArea.append(par.getTypeName());
	 i++;
	 }

	 textArea.append(")\n");
	 }

	}

	}
试试其它关键字
　java　　反射　
同语言下
可能有用的
锦湖贡献的其它代码(3)