Ints indexOf()函数|番石榴| Java
原文:https://www . geesforgeks . org/ints-indexof-function-guava-Java/
番石榴的T1Ints。indexOf(int[]数组，int target) 方法返回数组中值目标的第一个 外观的索引。
语法:
public static int indexOf(int[] array, int target)
参数:此方法接受以下参数:
- Array: An array of int values, which may be empty.
- Target: An original int value.
返回值:此方法返回 最小索引 i 为哪个数组[i] ==目标，或者 -1 如果不存在这样的索引。
例 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");
}
}
}
输出:
Target is present at index 2
例 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");
}
}
}
输出:
Target is not present in the array
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