Java中Class的getDeclaredMethods和getMethods的区别

本文主要是介绍Java中Class的getDeclaredMethods和getMethods的区别，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

在实际中经常需要使用反射机制获取类的属性和方法等信息．
Ｃlass中有两个方法可以获取类的方法：getDeclaredMethods和getMethods
下面实例说明这两个的区别

创建person类

class person{private float height;private float weight;void  getPersonName() {}public void  getPersonHeight() {}private void  getPersonWeight() {}protected void getPersonColor() {}
}

创建person类的子类

class student extends person {private String name;private int age;public student() {super();}void  getStudentHeight() {}    public void  getStudentName() {}   private void  getStudentAge() {}protected void getStudentColor() {}   
}

测试

public class reflect {public static void main(String[] args) {  try {Class classzz  = Class.forName("student");System.out.println("classzz = " + classzz);//getMethods方法Method[]  methods =  classzz.getMethods();System.out.println(" ----getMethods: ");for(Method m : methods) {System.out.println(m);}//getDeclaredMethods　方法Method[]  declaredMethods =  classzz.getDeclaredMethods();System.out.println("\r\n ----declaredMethods: ");for(Method m : declaredMethods) {System.out.println(m);}           } catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}     }
}

输出

classzz = class student----getMethods: 
public void student.getStudentName()
public void person.getPersonHeight()
public final void java.lang.Object.wait(long,int) throws java.lang.InterruptedException
public final void java.lang.Object.wait() throws java.lang.InterruptedException
public final native void java.lang.Object.wait(long) throws java.lang.InterruptedException
public boolean java.lang.Object.equals(java.lang.Object)
public java.lang.String java.lang.Object.toString()
public native int java.lang.Object.hashCode()
public final native java.lang.Class java.lang.Object.getClass()
public final native void java.lang.Object.notify()
public final native void java.lang.Object.notifyAll()----declaredMethods: 
void student.getStudentHeight()
public void student.getStudentName()
private void student.getStudentAge()
protected void student.getStudentColor()