Java 中的 LongBuffer slice()方法
原文:https://www . geesforgeks . org/longbuffer-slice-method-in-Java/
类的 slice() 方法用于创建一个新的长缓冲区，其内容是给定缓冲区内容的共享子序列。
新缓冲区的内容将从该缓冲区的当前位置开始。对此缓冲区内容的更改将在新缓冲区中可见，反之亦然。两个缓冲器的位置、极限和标记值将是独立的。
新缓冲区的位置将为零，其容量和限制将是该缓冲区中剩余的 Longegers 的数量，并且其标记将是未定义的。如果且仅当该缓冲区是直接的，则新缓冲区将是直接的；如果且仅当该缓冲区是只读的，则新缓冲区将是只读的。
语法:
public abstract LongBuffer slice()
返回值:该方法返回新的 Long 缓冲区。
下面是说明 slice()方法的示例:
例 1:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to demonstrate
// slice() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the LongBuffer
int capacity = 10;
// Creating the LongBuffer
try {
// creating object of Longbuffer
// and allocating size capacity
LongBuffer ib1 = LongBuffer.allocate(capacity);
// putting the value in Longbuffer
ib1.put(8);
ib1.put(9);
// prLong the LongBuffer
System.out.println("Original LongBuffer: "
+ Arrays.toString(ib1.array()));
// prLong the LongBuffer position
System.out.println("position: " + ib1.position());
// prLong the LongBuffer capacity
System.out.println("capacity: " + ib1.capacity());
// Creating a shared subsequence buffer of given LongBuffer
// using slice() method
LongBuffer ib2 = ib1.slice();
// prLong the shared subsequence buffer
System.out.println("shared subsequence LongBuffer: "
+ Arrays.toString(ib2.array()));
// prLong the LongBuffer position
System.out.println("position: " + ib2.position());
// prLong the LongBuffer capacity
System.out.println("capacity: " + ib2.capacity());
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
Output
Original LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]
position: 2
capacity: 10
shared subsequence LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]
position: 0
capacity: 8
例 2:
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to demonstrate
// slice() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the LongBuffer
int capacity = 10;
// Creating the LongBuffer
try {
// creating object of Longbuffer
// and allocating size capacity
LongBuffer ib1 = LongBuffer.allocate(capacity);
// putting the value in floatbuffer
ib1.put(8);
ib1.put(9);
ib1.put(5);
ib1.put(3);
// prLong the LongBuffer
System.out.println("Original LongBuffer: "
+ Arrays.toString(ib1.array()));
// prLong the LongBuffer position
System.out.println("position: " + ib1.position());
// prLong the LongBuffer capacity
System.out.println("capacity: " + ib1.capacity());
// Creating a shared subsequence buffer of given LongBuffer
// using slice() method
LongBuffer ib2 = ib1.slice();
ib2.put(2);
ib2.put(6);
// prLong the shared subsequence buffer
System.out.println("shared subsequence LongBuffer: "
+ Arrays.toString(ib2.array()));
// prLong the LongBuffer position
System.out.println("position: " + ib2.position());
// prLong the LongBuffer capacity
System.out.println("capacity: " + ib2.capacity());
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
Output
Original LongBuffer: [8, 9, 5, 3, 0, 0, 0, 0, 0, 0]
position: 4
capacity: 10
shared subsequence LongBuffer: [8, 9, 5, 3, 2, 6, 0, 0, 0, 0]
position: 2
capacity: 6
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