Java 番石榴| Booleans.indexOf(布尔[]数组，布尔目标)方法示例
Booleans.indexOf(布尔[]数组，布尔目标)法番石榴的 Booleans 类接受两个参数 数组 和 目标 。如果目标存在于数组中，该方法返回其第一次出现的的位置。如果数组中不存在目标，则该方法返回 -1 。
*语法:*
*公共静态 int indexOf(布尔[]数组，布尔目标)*
*参数:*该方法接受两个参数:
- *数组:*是检查目标数组索引的整数数组。
- *目标:*是在指定数组中作为元素搜索的值。
*返回值:*该方法返回一个整数值如下:
If the target exists in the array, the position where the target first appears is returned. Otherwise, if there is no target in the array, return -1 .
*异常:*该方法不抛出任何异常。
下面的例子说明了上述方法的实现:
*例 1:*
// Java code to show implementation of
// Guava's Booleans.indexOf(boolean[] array,
// boolean target) method
import com.google.common.primitives.Booleans;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an boolean array
boolean[] arr = { true, true, false, true, false };
boolean target = false;
System.out.println("Array: "
+ Arrays.toString(arr));
System.out.println("Target: " + target);
// Using Booleans.indexOf(boolean[] array, boolean target)
// method to get the position of the first
// occurrence of the specified target within array,
// or -1 if there is no such occurrence.
int index = Booleans.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:
Array: [true, true, false, true, false]
Target: false
Target is present at index 2
例 2:
// Java code to show implementation of
// Guava's Booleans.indexOf(boolean[] array,
// boolean target) method
import com.google.common.primitives.Booleans;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an boolean array
boolean[] arr = { true, true, true };
boolean target = false;
System.out.println("Array: "
+ Arrays.toString(arr));
System.out.println("Target: " + target);
// Using Booleans.indexOf(boolean[] array, boolean target)
// method to get the start position of the first
// occurrence of the specified target within array,
// or -1 if there is no such occurrence.
int index = Booleans.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:
Array: [true, true, true]
Target: false
Target is not present in the array
版权属于：月萌API www.moonapi.com，转载请注明出处
