Guava 的Ints.lastIndexOf()返回值目標在數組中最後一次出現的索引。
用法:
public static int lastIndexOf(int[] array, int target)
參數:
- array:一個int值數組,可能為空。
- target:基本的int值。
返回值:Ints.indexOf()方法返回array [i] ==目標的最大索引i,如果不存在此索引,則返回-1。
範例1:
// Java code to show implementation of
// Guava's Ints.lastIndexOf() 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, 3, 4 };
int target = 3;
// Using Ints.lastIndexOf() method to get the
// index of last appearance of a given element
// in array and return -1 if element is
// not found in the array
int index = Ints.lastIndexOf(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");
}
}
}
輸出:
Target is present at index 6
範例2:
// Java code to show implementation of
// Guava's Ints.lastIndexOf() 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.lastIndexOf() method to get the
// index of last appearance of a given element
// in array and return -1 if element is
// not found in the array
int index = Ints.lastIndexOf(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");
}
}
}
輸出:
Target is not present in the array
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