java反射简单实例

￡神魔★判官ぃ 2022-05-30 05:49 186阅读 0赞

package com.wx.test;
    
    public class Person {
        private String name;
        private int ID;
        public String speed;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public int getID() {
            return ID;
        }
    
        public void setID(int ID) {
            this.ID = ID;
        }
    
        public String getSpeed() {
            return speed;
        }
    
        public void setSpeed(String speed) {
            this.speed = speed;
        }
        public void Speak(){
            System.out.println("Hello! "+"My name is "+name);
        }
        public void run(String speed){
            System.out.println("I can run " + speed+" KM!!!");
        }
    }

测试：

package com.wx.test;
    
    import java.lang.reflect.InvocationTargetException;
    import java.lang.reflect.Method;
    
    public class MAIN {
        public static void main(String[] args) {
            Person p=new Person();
            p.setName("sasa");
            p.setSpeed("5");
            p.Speak();  //Hello! My name is sasa
            p.run("10");//I can run 10 KM!!!
            Method m1=null;
            Method m2=null;
            try {
                // m1   public void com.wx.test.Person.Speak()
                m1=p.getClass().getMethod("Speak",null);
                //  m2    public void com.wx.test.Person.run(java.lang.String)
                m2=p.getClass().getMethod("run",String.class);
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            }
            try {
                m1.invoke(p,null);//Hello! My name is sasa
                m2.invoke(p,"10");//I can run 10 KM!!!
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
    
        }
    }

//转自   http://blog.csdn.net/handsome\_fan/article/details/54846959

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