java.nio.LongBuffer类的slice()方法用于创建一个新的Long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。对该缓冲区内容的更改将在新缓冲区中可见,反之亦然。这两个缓冲区的位置,限制和标记值将是独立的。
新缓冲区的位置将为零,其容量和限制将是此缓冲区中剩余的Longegers数量,并且其标记将不确定。当且仅当该缓冲区是直接缓冲区时,新缓冲区才是直接缓冲区;当且仅当该缓冲区是只读缓冲区时,新缓冲区才是只读缓冲区。
用法:
public abstract LongBuffer slice()
返回值:此方法返回新的Long缓冲区。
下面是说明slice()方法的示例:
示例1:
// 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 subsequance buffer of given LongBuffer
// using slice() method
LongBuffer ib2 = ib1.slice();
// prLong the shared subsequance buffer
System.out.println("shared subsequance 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");
}
}
}
输出:
Original LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0] position: 2 capacity: 10 shared subsequance LongBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0] position: 0 capacity: 8
示例2:
// 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 subsequance buffer of given LongBuffer
// using slice() method
LongBuffer ib2 = ib1.slice();
ib2.put(2);
ib2.put(6);
// prLong the shared subsequance buffer
System.out.println("shared subsequance 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");
}
}
}
输出:
Original LongBuffer: [8, 9, 5, 3, 0, 0, 0, 0, 0, 0] position: 4 capacity: 10 shared subsequance LongBuffer: [8, 9, 5, 3, 2, 6, 0, 0, 0, 0] position: 2 capacity: 6
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注:本文由纯净天空筛选整理自pawan_asipu大神的英文原创作品 LongBuffer slice() method in Java。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。