Guava’s Ints.indexOf(int[] array, int target) method returns the index of the first appearance of the value target in array.
Syntax:
public static int indexOf(int[] array, int target)
Parameters: This method accepts the following parameters:
- array: An array of int values, possibly empty.
- target: A primitive int value.
Return Value: This method returns the least index i for which array[i] == target, or -1 if no such index exists.
Example 1:
// Java code to show implementation of // Guava's Ints.indexOf() method import com.google.common.primitives.Ints;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an integer array
int [] arr = { 1 , 2 , 3 , 4 , 3 , 5 };
int target = 3 ;
// Using Ints.indexOf(int[] array, int target)
// method to get the index of first appearance
// of a given element in array and return -1
// if element is not found in the array
int index = Ints.indexOf(arr, target);
if (index != - 1 ) {
System.out.println( "Target is present at index "
+ index);
}
else {
System.out.println( "Target is not present"
+ " in the array" );
}
}
} |
Output:
Target is present at index 2
Example 2:
// Java code to show implementation of // Guava's Ints.indexOf() method import com.google.common.primitives.Ints;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an integer array
int [] arr = { 3 , 5 , 7 , 11 , 13 };
int target = 17 ;
// Using Ints.indexOf(int[] array, int target) method
// to get the index of first appearance of a
// given element in array and return -1 if
// element is not found in the array
int index = Ints.indexOf(arr, target);
if (index != - 1 ) {
System.out.println( "Target is present at index "
+ index);
}
else {
System.out.println( "Target is not present"
+ " in the array" );
}
}
} |
Output:
Target is not present in the array
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