package Reflect;

public class MyTest {

    public int a;

    public static int b;

    public static final int c = 0;

    private int d;

    public int sum(int a, int b, String c) {

        return a + b;

    }

    public int sub(int a, int b, String c) {

        return a - b;

    }

    MyTest() {

    }

    MyTest(int a, int b) {

    }

}

package Reflect;

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

public class Test {

    public static void main(String[] args) {

        System.out.println(MyTest.class);

        final Class<?> clazz = MyTest.class;

        System.out.println(clazz.getClass());

        final Field[] fields = clazz.getDeclaredFields();

        System.out.println("====print fields===");

        for (final Field f : fields) {

            System.out.print(f.getName() + "->");

            System.out.print(f.getModifiers() + "->");

            System.out.println(Modifier.toString(f.getModifiers()));

        }

}
输出：
class Reflect.MyTest
class java.lang.Class
====print fields===
a->1->public
b->9->public static
c->25->public static final
d->2->private

package Reflect;

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

public class Test {

    public static void main(String[] args) {

        System.out.println(MyTest.class);

        final Class<?> clazz = MyTest.class;

        System.out.println(clazz.getClass());

        final Field[] fields = clazz.getDeclaredFields();

        System.out.println("====print Method===");

        final Method[] ms = clazz.getMethods();

        for (final Method m : ms) {

            System.out.println();

            System.out.print(m.getName() + "==||");

            System.out.print(m.getReturnType().getName() + "==||");

            for (final Class o : m.getParameterTypes()) {

                System.out.print(",==" + o.getName());

            }

        }

    }

}
输出:
====print Method===
sum==||int==||,==int,==int,==java.lang.String
sub==||int==||,==int,==int,==java.lang.String
wait==||void==||
wait==||void==||,==long,==int
wait==||void==||,==long
hashCode==||int==||
getClass==||java.lang.Class==||
equals==||boolean==||,==java.lang.Object
toString==||java.lang.String==||
notify==||void==||
notifyAll==||void==||

package Reflect;

import java.lang.reflect.Constructor;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.lang.reflect.Modifier;

public class Test {

    public static void main(String[] args) {

        System.out.println(MyTest.class);

        final Class<?> clazz = MyTest.class;

        System.out.println(clazz.getClass());

        System.out.println();

        System.out.println("====print Constructor===");

        final Constructor[] cs = clazz.getDeclaredConstructors();

        for (final Constructor c : cs) {

            System.out.println();

            System.out.print(c.getName());

            for (final Class o : c.getParameterTypes()) {

                System.out.print(",==" + o.getName());

            }

        }

    }

}

输出：
====print Constructor===
Reflect.MyTest 
Reflect.MyTest,==int,==int