作者：朗月清风的海角 | 来源：互联网 | 2023-10-10 15:14
Java 番石榴| Floats.indexOf(float[]数组，float[]目标)方法示例
原文:https://www . geesforgeks . org/Java-guava-floats-index offoat-array-float-target-method-with-examples/
flowers . indexof(float[]数组，float[] target) 法番石榴的flowers 类接受两个参数 数组 和 target 。如果目标存在于数组中，该方法返回其第一次出现的的开始位置。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(float[]数组，float[] target)*
*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:*作为指定数组的子序列进行搜索的数组。
*返回值:*该方法返回如下整数值:
If there is a target array in the array, return the starting position where the target first appears . 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 Floats.indexOf(float[] array,
// float[] target) method
import com.google.common.primitives.Floats;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an float array
float[] arr = { 1.2f, 2.3f, 3.4f,
4.5f, 3.4f, 5.6f };
float[] target = { 3.4f, 4.5f, 3.4f };
System.out.println("Array: "
+ Arrays.toString(arr));
System.out.println("Target Array: "
+ Arrays.toString(target));
// Using Floats.indexOf(float[] array, float[] 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 = Floats.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: [1.2, 2.3, 3.4, 4.5, 3.4, 5.6]
Target Array: [3.4, 4.5, 3.4]
Target is present at index 2
例 2:
// Java code to show implementation of
// Guava's Floats.indexOf(float[] array,
// float[] target) method
import com.google.common.primitives.Floats;
import java.util.Arrays;
class GFG {
// Driver's code
public static void main(String[] args)
{
// Creating an float array
float[] arr = { 3.2f, 5.3f, 7.4f,
11.4f, 13.5f };
float[] target = { 17.5f, 12.4f };
System.out.println("Array: "
+ Arrays.toString(arr));
System.out.println("Target Array: "
+ Arrays.toString(target));
// Using Floats.indexOf(float[] array, float[] 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 = Floats.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: [3.2, 5.3, 7.4, 11.4, 13.5]
Target Array: [17.5, 12.4]
Target is not present in the array
参考:https://Google . github . io/guava/releases/22.0/API/docs/com/Google/common/primitive/floats . html # indexOf-float:A-float:A-**
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