package com.alamps.classdemo;
interface China {
public static final String NAME = "ALAMPS"; public static final String NATIONAL = "CHINA";void sayChina();
String sayHello(String name,int age);
}
public class Programmer implements China {
private int age;
private String name;/**
* 无参 */ public Programmer() { // TODO Auto-generated constructor stub }/**
* 有一个参数的构造 * * @param name */ public Programmer(String name) { super(); this.name = name; }/**
* 有二个参数的构造 * * @param name * @param age */public Programmer(String name, int age) {
super(); this.name = name; this.age = age; }public int getAge() {
return age; }public String getName() {
return name; }@Override
public void sayChina() { // TODO Auto-generated method stub System.out.println("程序员的名字是："+NAME+",国籍是："+NATIONAL); }@Override
public String sayHello(String name,int age) { // TODO Auto-generated method stub return "姓名="+name+",年龄="+age; }public void setAge(int age) {
this.age = age; }public void setName(String name) {
this.name = name; }@Override
public String toString() { return "姓名：" + this.name + ",年龄：" + this.age; }}
Title@Test
// 在反射中如何调用类中的Setter()AndGetter()方法：例如：取得Programmer类中的SetterAndGetter方法 public void InvokeSetterAndGetter() { Class<?> c = null;// 声明Class对象 Object oo = null;// 声明一个对象try {
c = Class.forName("com.alamps.classdemo.Programmer");// 最常用的形式 } catch (ClassNotFoundException e) { e.printStackTrace(); }try {
oo = c.newInstance();// 实例化操作对象 } catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); }setter(oo, "name", "七仙女", String.class);
setter(oo, "age", 18, int.class); System.out.print("姓名："); getter(oo, "name"); System.out.print(";年龄："); getter(oo, "age");}// end of method InvokeSetterAndGetter
// 姓名=猪八戒,年龄=8000
public static void setter(Object oo, String att, Object value,
Class<?> type) {// setName(String s) try { Method m = oo.getClass().getMethod("set" + initStr(att) ,type ); try { m.invoke(oo, value); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchMethodException e) { // TODO Auto-generated catch block e.printStackTrace(); } }public static void getter(Object oo, String att) {// getName()
try { Method m = oo.getClass().getMethod("get" + initStr(att)); try { System.out.print(m.invoke(oo)); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchMethodException e) { // TODO Auto-generated catch block e.printStackTrace(); } }public static String initStr(String old) {
// TODO Auto-generated method stub String newstr = old.substring(0, 1).toUpperCase() + old.substring(1);// 将一个字符串的第一个单词大写 return newstr; }v