Java基础之反射原理与用法详解

package com.reflect.test;
public class Student {
  private int id;
  private String name;
  public Student() {}
  public Student(int id, String name) {
    super();
    this.id = id;
    this.name = name;
  }
  public int getId() {
    return id;
  }
  public void setId(int id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  @Override
  public String toString() {
    return "Student [id=" + id + ", name=" + name + "]";
  }
}

package com.reflect.test;
public class Test {
  Student stu = new Student();
  public static void main(String[] args) {
    Test test = new Test();
    test.getClassName();
  }
  //获得完整的包名和类名
  public void getClassName() {
    System.out.println(stu.getClass().getName());
  }
}

　　 public static void main(String[] args) {
    Test test = new Test();
    test.getStudentClass();
  }
  //获取Class对象的三种犯法
  public void getStudentClass() {
    //第一种方法，forName
    Class<?> class1;
    try {
      class1 = Class.forName("com.reflect.test.Student");
      System.out.println("class1:"+class1);
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }
    //第二种方法，class
    Class<?> class2 = Student.class;
    System.out.println("class2:"+class2);
    //第三种方法，getClass()
    Student stu1 = new Student();
    Class<?> class3 = stu1.getClass();
    System.out.println("class3:"+class3);
  }