How do I do bitwise exclusive OR operation?

By Wayan in Basic, Core API 0 Comment 
package org.kodejava.lang;

public class XorDemo {
    public static void main(String[] args) {
        int numberA = 16;
        int numberB = 32;

        // Operator ^ is used for doing bitwise exclusive OR operation
        int result = numberA ^ numberB;

        System.out.println(numberA + " ^ " + numberB + " = " + result);

        // Print the result in binary format
        System.out.println(Integer.toBinaryString(numberA) +
                " ^ " + Integer.toBinaryString(numberB) +
                " = " + Integer.toBinaryString(result));
    }
}

The program prints the following output:

16 ^ 32 = 48
10000 ^ 100000 = 110000

How do I do bitwise OR operation?

By Wayan in Basic, Core API 0 Comment 
package org.kodejava.lang;

public class OrDemo {
    public static void main(String[] args) {
        int numberA = 16;
        int numberB = 4;

        // Operator "|" is used for doing bitwise OR operation
        int result = numberA | numberB;

        System.out.println(numberA + " | " + numberB + " = " + result);

        // Print the result in binary format
        System.out.println(Integer.toBinaryString(numberA) +
                " | " + Integer.toBinaryString(numberB) +
                " = " + Integer.toBinaryString(result));
    }
}

The result of the code snippet:

16 | 4 = 20
10000 | 100 = 10100

How do I do bitwise AND operation?

By Wayan in Basic, Core API 0 Comment 
package org.kodejava.lang;

public class AndDemo {
    public static void main(String[] args) {
        int numberA = 16;
        int numberB = 16;

        // Operator "&"  is used for doing bitwise AND operation
        int result = numberA & numberB;

        System.out.println(numberA + " & " + numberB + " = " + result);

        // Print the result in binary format
        System.out.println(Integer.toBinaryString(numberA) +
                " & " + Integer.toBinaryString(numberB) +
                " = " + Integer.toBinaryString(result));
    }
}

The result of the code snippet:

16 & 16 = 16
10000 & 10000 = 10000

How do I prevent bean’s property being serialized to XML?

By Wayan in Beans 0 Comment 
package org.kodejava.bean;

import java.beans.*;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;

public class BeanToXmlTransient {
    private Long id;
    private String itemName;
    private String itemColour;
    private Integer itemQuantities;

    static {
        try {
            // In this block will change the attribute type of the 
            // itemQuantities to transient, so it will be not serialized 
            // to xml when we use XMLEncode to convert the bean to xml 
            // persistence.
            BeanInfo bi = Introspector.getBeanInfo(BeanToXmlTransient.class);
            PropertyDescriptor[] pds = bi.getPropertyDescriptors();
            for (PropertyDescriptor propertyDescriptor : pds) {
                if (propertyDescriptor.getName().equals("itemQuantities")) {
                    propertyDescriptor.setValue("transient", Boolean.TRUE);
                }
            }
        } catch (IntrospectionException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        BeanToXmlTransient bean = new BeanToXmlTransient();
        bean.setId(1L);
        bean.setItemName("T-Shirt");
        bean.setItemColour("Dark Red");
        bean.setItemQuantities(100);

        try {
            XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
                    new FileOutputStream("BeanTransient.xml")));

            // Write an XML representation of the specified object to the 
            // output.
            encoder.writeObject(bean);
            encoder.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getItemName() {
        return itemName;
    }

    public void setItemName(String itemName) {
        this.itemName = itemName;
    }

    public String getItemColour() {
        return itemColour;
    }

    public void setItemColour(String itemColour) {
        this.itemColour = itemColour;
    }

    public Integer getItemQuantities() {
        return itemQuantities;
    }

    public void setItemQuantities(Integer itemQuantities) {
        this.itemQuantities = itemQuantities;
    }
}

Here will see the the itemQuantities property is not serialized to XML.

<?xml version="1.0" encoding="UTF-8"?>
<java version="17" class="java.beans.XMLDecoder">
 <object class="org.kodejava.bean.BeanToXmlTransient">
  <void property="id">
   <long>1</long>
  </void>
  <void property="itemColour">
   <string>Dark Red</string>
  </void>
  <void property="itemName">
   <string>T-Shirt</string>
  </void>
 </object>
</java>

How do I convert LinkedList to array?

By Wayan in Core API, Util Package 0 Comment 
package org.kodejava.util;

import java.util.LinkedList;
import java.util.List;

public class LinkedListToArray {
    public static void main(String[] args) {
        List<String> list = new LinkedList<>();
        list.add("Blue");
        list.add("Green");
        list.add("Purple");
        list.add("Orange");

        // Converting LinkedList to array can be done by calling the toArray()
        // method of the List;
        String[] colors = new String[list.size()];
        list.toArray(colors);

        for (String color : colors) {
            System.out.println("color = " + color);
        }
    }
}