java_class.getMethod 与 class.getDeclaredMethod的区别

public class Test {

private int a;

float b;

protected double c;

public long d;

private void print(){

}

void print(int a){

}

protected void print(float a){

}

public void print(double a){

}

@org.junit.Test
public void test() throws SecurityException, NoSuchMethodException, NoSuchFieldException{
//getMethod getField方法只可以获取修饰符为public的方法 参数

// System.out.println(Test.class.getMethod("print", new Class<?>[]{}));

// System.out.println(Test.class.getMethod("print", new Class<?>[]{int.class}));

// System.out.println(Test.class.getMethod("print", new Class<?>[]{float.class}));

// System.out.println(Test.class.getMethod("print", new Class<?>[]{double.class}));

// System.out.println(Test.class.getField("a"));

// System.out.println(Test.class.getField("b"));

// System.out.println(Test.class.getField("c"));

// System.out.println(Test.class.getField("d"));
//getDeclaredMethod 
System.out.println(Test.class.getDeclaredMethod("print", new Class<?>[]{}));
System.out.println(Test.class.getDeclaredMethod("print", new Class<?>[]{int.class}));
System.out.println(Test.class.getDeclaredMethod("print", new Class<?>[]{float.class}));
System.out.println(Test.class.getDeclaredMethod("print", new Class<?>[]{double.class}));

System.out.println(Test.class.getDeclaredField("a"));
System.out.println(Test.class.getDeclaredField("b"));
System.out.println(Test.class.getDeclaredField("c"));
System.out.println(Test.class.getDeclaredField("d"));
}

}
通过以上demo可以看出getMethod与getDeclaredMethod的区别在于,前者只可以访问public的方法,后者可以访问所有修饰符修饰的方法

原文地址：http://m.blog.csdn.net/blog/Asarja/8948894