Ints is a utility class for primitive type int. It provides Static utility methods pertaining to int primitives, that are not already found in either Integer or Arrays.
Declaration :
@GwtCompatible(emulated=true) public final class Ints extends Object
Below table shows the Field summary for Guava Ints Class :
Some of the methods provided by Ints Class are :
Exceptions :
- checkedCast : IllegalArgumentException if value is greater than Integer.MAX_VALUE or less than Integer.MIN_VALUE
- min : IllegalArgumentException if array is empty.
- max : IllegalArgumentException if array is empty.
- fromByteArray : IllegalArgumentException if bytes has fewer than 4 elements.
- ensureCapacity : IllegalArgumentException if minLength or padding is negative.
- toArray : NullPointerException if collection or any of its elements is null.
Below table shows some other methods provided by Guava’s Ints Class :
Below given are some examples showing the implementation of methods of Guava’s Ints Class :
Example 1 :
// Java code to show implementation // of Guava Ints.asList() method import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
int arr[] = { 5 , 10 , 15 , 20 , 25 };
// Using Ints.asList() method which wraps
// the primitive integer array as List of
// integer Type
List<Integer> myList = Ints.asList(arr);
// Displaying the elements
System.out.println(myList);
}
} |
Output :
[5, 10, 15, 20, 25]
Example 2 :
// Java code to show implementation // of Guava Ints.toArray() method import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
List<Integer> myList = Arrays.asList( 5 , 10 , 15 , 20 , 25 );
// Using Ints.toArray() method which
// converts a List of Integer to an
// array of int
int [] arr = Ints.toArray(myList);
// Displaying the elements
System.out.println(Arrays.toString(arr));
}
} |
Output :
[5, 10, 15, 20, 25]
Example 3 :
// Java code to show implementation // of Guava Ints.concat() method import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
int [] arr1 = { 5 , 10 , 15 };
int [] arr2 = { 20 , 25 };
// Using Ints.concat() method which
// combines arrays from specified
// arrays into a single array
int [] arr = Ints.concat(arr1, arr2);
// Displaying the elements
System.out.println(Arrays.toString(arr));
}
} |
Output :
[5, 10, 15, 20, 25]
Example 4 :
// Java code to show implementation // of Guava Ints.contains() method import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int [] arr = { 5 , 10 , 15 , 20 };
// Using Ints.contains() method which
// checks if element is present in array
// or not
System.out.println(Ints.contains(arr, 10 ));
System.out.println(Ints.contains(arr, 17 ));
}
} |
output :
true false
Example 5 :
// Java code to show implementation // of Guava Ints.min() method import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int [] arr = { 5 , 10 , 15 , 20 };
// Using Ints.min() method
System.out.println(Ints.min(arr));
}
} |
Output :
5
Example 6 :
// Java code to show implementation // of Guava Ints.max() method import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int [] arr = { 5 , 10 , 15 , 20 };
// Using Ints.max() method
System.out.println(Ints.max(arr));
}
} |
Output :
20