Java註解及反射得到註解

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Class類的方法

f

 

 

 

package com.part1;/** *  * @author pc * */public class Student {    public int sid;    public char sex;    private String sname;    private String password;    private String cardno;    private double money;        public Student() {    }    public Student(int sid, String sname, String password, String cardno,            double money) {        this.sid = sid;        this.sname = sname;        this.password = password;        this.cardno = cardno;        this.money = money;    }    public int getSid() {        return sid;    }    public void setSid(int sid) {        this.sid = sid;    }    public String getSname() {        return sname;    }    public void setSname(String sname) {        this.sname = sname;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getCardno() {        return cardno;    }    public void setCardno(String cardno) {        this.cardno = cardno;    }    public double getMoney() {        return money;    }    public void setMoney(double money) {        this.money = money;    }        public char getSex() {        return sex;    }    public void setSex(char sex) {        this.sex = sex;    }    @Override    public String toString() {        return "Student [cardno=" + cardno + ", money=" + money + ", password="                + password + ", sex=" + sex + ", sid=" + sid + ", sname="                + sname + "]";    }            }

student實體類

package com.part1;import java.lang.reflect.Field;import java.lang.reflect.Method;public class Test {    public static void main(String[] args) throws ClassNotFoundException, SecurityException, NoSuchFieldException, NoSuchMethodException {        //1.擷取Class對象        //1.1 第一種擷取Class對象方法：對象名.getClass()        Student stu=new Student(1, "李震東", "123", "3201121990", 47.5);        Class<Student> cla1=(Class<Student>) stu.getClass();        System.out.println(cla1);                //1.2 第二種擷取Class對象的方法：類名.class;        Class<Student> cla2=Student.class;        System.out.println(cla2);                //1.3 第三種擷取Class對象的方法：        Class<Student> cla3=(Class<Student>) Class.forName("com.part1.Student");        System.out.println(cla3);                //2.擷取屬性        //2.1先擷取所有public屬性        System.out.println("--------2.1先擷取所有public屬性---------");        Field[] fields1=cla1.getFields();        for (Field field : fields1) {            System.out.println(field);        }        //2.2 擷取某個屬性        System.out.println("---------2.2擷取某個屬性---------");        Field field2 =cla2.getField("sex");        System.out.println(field2);                //3.擷取方法        //3.1 擷取所有的public方法        System.out.println("------3.1 擷取所有的public方法------");        Method[] methods=cla1.getMethods();        for (Method method : methods) {            System.out.println(method);        }                //3.2 擷取某個public方法        System.out.println("---------3.2 擷取某個public方法---------");        Method method2=cla2.getMethod("setSname", String.class);        System.out.println(method2);                                            }}

java得到對象屬性和方法

package com.part1;import java.lang.reflect.Field;import java.lang.reflect.Method;public class Test {    public static void main(String[] args) throws ClassNotFoundException, SecurityException, NoSuchFieldException, NoSuchMethodException {        //1.擷取Class對象        //1.1 第一種擷取Class對象方法：對象名.getClass()        Student stu=new Student(1, "李震東", "123", "3201121990", 47.5);        Class<Student> cla1=(Class<Student>) stu.getClass();        System.out.println(cla1);                //1.2 第二種擷取Class對象的方法：類名.class;        Class<Student> cla2=Student.class;        System.out.println(cla2);                //1.3 第三種擷取Class對象的方法：        Class<Student> cla3=(Class<Student>) Class.forName("com.part1.Student");        System.out.println(cla3);                //2.擷取屬性        //2.1先擷取所有public屬性        System.out.println("--------2.1先擷取所有public屬性---------");        Field[] fields1=cla1.getFields();        for (Field field : fields1) {            System.out.println(field);        }        //2.2 擷取某個屬性        System.out.println("---------2.2擷取某個屬性---------");        Field field2 =cla2.getField("sex");        System.out.println(field2);                //3.擷取方法        //3.1 擷取所有的public方法        System.out.println("------3.1 擷取所有的public方法------");        Method[] methods=cla1.getMethods();        for (Method method : methods) {            System.out.println(method);        }                //3.2 擷取某個public方法        System.out.println("---------3.2 擷取某個public方法---------");        Method method2=cla2.getMethod("setSname", String.class);        System.out.println(method2);                                            }}

java動態調用賦值

 

Java註解及反射得到註解