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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");
        }
 
    }
 
}
//源代码片段来自云代码http://yuncode.net
            
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