Ints 类|番石榴|爪哇
int是一个用于图元类型 int 的实用程序类。它提供了与 int 原语相关的静态实用方法，这些方法在 Integer 或 Arrays 中都找不到。
*申报:*
@GwtCompatible(emulated=true)
public final class Ints
extends Object
下表显示了番石榴 Ints 类的字段摘要:
Ints 类提供的一些方法有:
例外:****
- 如果值大于整数，则检查 cast:IllegalArgumentException。最大值或小于整数。最小值
- *min:IllegalArgumentException若阵为空。*
- *max:IllegalArgumentException如果数组为空。*
- *from bytearray:IllegalArgumentException如果字节少于 4 个元素。*
- *确保容量: 如果最小长度或填充值为负，则显示“异常”。*
- *to array:NullPointerException如果集合或其任何元素为空。*
下表显示了番石榴 Ints 类提供的一些其他方法:
下面给出了一些示例，显示了番石榴 Ints 类的方法的实现:
示例 1 :****
// Java code to show implementation
// of Guava Ints.asList() method
import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
int arr[] = { 5, 10, 15, 20, 25 };
// Using Ints.asList() method which wraps
// the primitive integer array as List of
// integer Type
List<Integer> myList = Ints.asList(arr);
// Displaying the elements
System.out.println(myList);
}
}
输出:
[5, 10, 15, 20, 25]
*例 2 :*
// Java code to show implementation
// of Guava Ints.toArray() method
import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
List<Integer> myList = Arrays.asList(5, 10, 15, 20, 25);
// Using Ints.toArray() method which
// converts a List of Integer to an
// array of int
int[] arr = Ints.toArray(myList);
// Displaying the elements
System.out.println(Arrays.toString(arr));
}
}
输出:
[5, 10, 15, 20, 25]
*例 3 :*
// Java code to show implementation
// of Guava Ints.concat() method
import com.google.common.primitives.Ints;
import java.util.*;
class GFG {
// Driver method
public static void main(String[] args)
{
int[] arr1 = { 5, 10, 15 };
int[] arr2 = { 20, 25 };
// Using Ints.concat() method which
// combines arrays from specified
// arrays into a single array
int[] arr = Ints.concat(arr1, arr2);
// Displaying the elements
System.out.println(Arrays.toString(arr));
}
}
输出:
[5, 10, 15, 20, 25]
*例 4 :*
// Java code to show implementation
// of Guava Ints.contains() method
import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int[] arr = { 5, 10, 15, 20 };
// Using Ints.contains() method which
// checks if element is present in array
// or not
System.out.println(Ints.contains(arr, 10));
System.out.println(Ints.contains(arr, 17));
}
}
输出:
true
false
*例 5 :*
// Java code to show implementation
// of Guava Ints.min() method
import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int[] arr = { 5, 10, 15, 20 };
// Using Ints.min() method
System.out.println(Ints.min(arr));
}
}
输出:
5
*例 6 :*
// Java code to show implementation
// of Guava Ints.max() method
import com.google.common.primitives.Ints;
class GFG {
// Driver method
public static void main(String[] args)
{
int[] arr = { 5, 10, 15, 20 };
// Using Ints.max() method
System.out.println(Ints.max(arr));
}
}
输出:
20
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