Java Reflection - Class.isInstance() Examples

package com.logicbig.example.clazz;

public class IsInstanceExample {

    public static void main(String... args) {
        Object object = new Thread();
        boolean b = Runnable.class.isInstance(object);
        System.out.println(b);
        b = Thread.class.isInstance(object);
        System.out.println(b);
    }
}

package com.logicbig.example.clazz;

public class IsInstanceExample2 {

    public static void main(String... args) throws IllegalAccessException, InstantiationException {
        int i = 5;
        boolean b = Object.class.isInstance(i);
        System.out.println(b);
    }
}

package com.logicbig.example.clazz;

import javax.swing.*;
import java.awt.*;

public class IsInstanceExample3 {

    public static void main(String... args) {
        Object object = new JLabel();
        boolean b = Component.class.isInstance(object);
        System.out.println(b);
    }
}

package com.logicbig.example.clazz;

public class IsInstanceExample4 {

    public static void main(String... args) {
        Object object = null;
        boolean b = void.class.isInstance(object);
        System.out.println(b);

        b = Void.class.isInstance(object);
        System.out.println(b);
    }
}

package com.logicbig.example.clazz;

public class IsInstanceExample5 {

    public static void main(String... args) {
        System.out.println("-- primitive arrays --");
        int[] numbers = {1, 2};
        boolean b = Object.class.isInstance(numbers);
        System.out.println(b);

        b = Object[].class.isInstance(numbers);
        System.out.println(b);

        System.out.println("-- object arrays --");
        Integer[] numbers2 = {1, 2};
        b = Object.class.isInstance(numbers2);
        System.out.println(b);

        b = Object[].class.isInstance(numbers2);
        System.out.println(b);

        b = Number[].class.isInstance(numbers2);
        System.out.println(b);

    }
}