Convert intArray (int[]) to integerArray (Integer[]) and vice versa with and without Commons Library in java


In this tutorial we will learn how to Convert intArray (int[]) to integerArray (Integer[]) and Convert integerArray (Integer[]) to intArray (int[]) with and without using Commons Library in java with program and examples.

Contents of page >
1. Convert intArray (int[]) to integerArray (Integer[]) in java
  • Program/Example 1.1 to Convert intArray (int[]) to integerArray (Integer[]) in java.
  • Program/Example 1.2 to Convert intArray (int[]) to integerArray (Integer[]) Using Commons Library in java.



2. Convert integerArray (Integer[]) to intArray (int[]) in java
  • Program/Example 2.1 to Convert integerArray (Integer[]) to intArray (int[]) in java.
  • Program/Example 2.2 to Convert integerArray (Integer[]) to intArray (int[]) Using Commons Library in java.


1. Convert intArray (int[]) to integerArray (Integer[]) in java
Program/Example 1.1 to Convert intArray (int[]) to integerArray (Integer[]) in java.

public class intArrayToIntegerArrayConversionExample {
   public static void main(String[] args) {
          /**
          * Convert intArray (int[]) to integerArray (Integer[])
          */
          int intArray[] = { 3, 4, 7 };
          Integer integerArray[] = new Integer[intArray.length];
          for (int i = 0; i < intArray.length; i++) {
                 //Autoboxing will be performed, int will automatically converted to Integer
                 integerArray[i] = intArray[i];
          }
          System.out.println("Display integerArray (Integer[])  formed from intArray (int[])");
          for (Integer integer : integerArray) {
                 System.out.print(integer+" ");
          }
   }
}
/*output
Display integerArray (Integer[])  formed from intArray (int[])
3 4 7
*/



Program/Example 1.2 to Convert intArray (int[]) to integerArray (Integer[]) Using Commons Library in java.

import org.apache.commons.lang3.ArrayUtils;
/**
* Convert intArray (int[]) to integerArray (Integer[]) Using Commons Library
*/
public class intArrayToIntegerArrayConversionUsingCommonsLibraryExample {
   public static void main(String[] args) {
          int intArray[] = { 3, 4, 7 };
         
          //convert intArray (int[]) to integerArray (Integer[])
          //using ArrayUtils.toObject(intArray) method of Commons Library
          Integer integerArray[] = ArrayUtils.toObject(intArray);
         
          System.out.println("Display integerArray (Integer[])  formed "
                       + "from intArray (int[]) using "
                       + "ArrayUtils.toObject(intArray) "
                       + "method of Commons Library");
          for (Integer integer : integerArray) {
                 System.out.print(integer+" ");
          }
   }
}
/*output
Display integerArray (Integer[])  formed from intArray (int[]) using ArrayUtils.toObject(intArray) method of Commons Library
3 4 7
*/



2. Convert integerArray (Integer[]) to intArray (int[]) in java >

Program/Example 2.1 to Convert integerArray (Integer[]) to intArray (int[]) in java.

public class IntegerArrayTointArrayConversionExample {
   public static void main(String[] args) {
          /**
          * Convert integerArray (Integer[]) to intArray (int[])
          */
          Integer[] integerArray = { 3, 4, 7 };
          int[] intArray = new int[integerArray.length];
          for (int i = 0; i < integerArray.length; i++) {
                 //Unboxing will be performed, Integer will be automatically converted to int
                 intArray[i] = integerArray[i];
          }
          System.out.println("Display intArray (int[]) formed from integerArray (Integer[]) ");
          for (int i : intArray) {
                 System.out.print(i+" ");
          }
   }
}
/*output
Display intArray (int[]) formed from integerArray (Integer[])
3 4 7
*/

Program/Example 2.2 to Convert integerArray (Integer[]) to intArray (int[]) Using Commons Library in java.

import org.apache.commons.lang3.ArrayUtils;
/**
* Convert integerArray (Integer[]) to intArray (int[]) Using Commons Library
*/
public class IntegerArrayTointArrayConversionUsingCommonsLibraryExample {
   public static void main(String[] args) {
          Integer[] integerArray = { 3, 4, 7 };
         
          //Convert integerArray (Integer[]) to intArray (int[]) Using
      //ArrayUtils.toPrimitive(integerArray) Commons Library
          int[] intArray = ArrayUtils.toPrimitive(integerArray);
          System.out.println("Display intArray (int[]) formed from integerArray (Integer[]) using "
                       + "ArrayUtils.toPrimitive(integerArray) "
                       + "method of Commons Library ");
          for (int i : intArray) {
                 System.out.print(i+" ");
          }
   }
}
/*output
Display intArray (int[]) formed from integerArray (Integer[]) using ArrayUtils.toPrimitive(integerArray) method of Commons Library
3 4 7
*/



Summary -
So in this tutorial we learned how to Convert intArray (int[]) to integerArray (Integer[]) and Convert integerArray (Integer[]) to intArray (int[]) with and without using Commons Library in java with program and examples.




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