java.nio.FloatBuffer类的slice()方法用于创建一个新的浮点缓冲区,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,其容量和限制将为该缓冲区中剩余的浮点数,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 FloatBuffer slice()
返回值:此方法返回新的浮点缓冲区。
下面是说明slice()方法的示例:
范例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 FloatBuffer
int capacity = 10;
// Creating the FloatBuffer
try {
// creating object of floatbuffer
// and allocating size capacity
FloatBuffer fb1 = FloatBuffer.allocate(capacity);
// putting the value in floatbuffer
fb1.put(8.56F);
fb1.put(9.61F);
// print the FloatBuffer
System.out.println("Original FloatBuffer: "
+ Arrays.toString(fb1.array()));
// print the FloatBuffer position
System.out.println("\nposition: " + fb1.position());
// print the FloatBuffer capacity
System.out.println("\ncapacity: " + fb1.capacity());
// Creating a shared subsequance buffer of given FloatBuffer
// using slice() method
FloatBuffer fb2 = fb1.slice();
// print the shared subsequance buffer
System.out.println("\nshared subsequance FloatBuffer: "
+ Arrays.toString(fb2.array()));
// print the FloatBuffer position
System.out.println("\nposition: " + fb2.position());
// print the FloatBuffer capacity
System.out.println("\ncapacity: " + fb2.capacity());
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出:
Original FloatBuffer: [8.56, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] position: 2 capacity: 10 shared subsequance FloatBuffer: [8.56, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] position: 0 capacity: 8
范例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 FloatBuffer
int capacity = 10;
// Creating the FloatBuffer
try {
// creating object of floatbuffer
// and allocating size capacity
FloatBuffer fb1 = FloatBuffer.allocate(capacity);
// putting the value in floatbuffer
fb1.put(8.56F);
fb1.put(9.61F);
fb1.put(0.56F);
fb1.put(3.61F);
// print the FloatBuffer
System.out.println("Original FloatBuffer: "
+ Arrays.toString(fb1.array()));
// print the FloatBuffer position
System.out.println("\nposition: " + fb1.position());
// print the FloatBuffer capacity
System.out.println("\ncapacity: " + fb1.capacity());
// Creating a shared subsequance buffer of given FloatBuffer
// using slice() method
FloatBuffer fb2 = fb1.slice();
fb2.put(2.34F);
fb2.put(6.34F);
// print the shared subsequance buffer
System.out.println("\nshared subsequance FloatBuffer: "
+ Arrays.toString(fb2.array()));
// print the FloatBuffer position
System.out.println("\nposition: " + fb2.position());
// print the FloatBuffer capacity
System.out.println("\ncapacity: " + fb2.capacity());
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出:
Original FloatBuffer: [8.56, 9.61, 0.56, 3.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] position: 4 capacity: 10 shared subsequance FloatBuffer: [8.56, 9.61, 0.56, 3.61, 2.34, 6.34, 0.0, 0.0, 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RohitPrasad3大神的英文原创作品 FloatBuffer slice() method in Java with Examples。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。