Java 中的 FloatBuffer slice()方法，示例
原文:https://www . geeksforgeeks . org/float buffer-slice-method-in-Java-with-examples/
类的 slice() 方法用于创建一个新的浮动缓冲区，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浮动数量，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 FloatBuffer slice()
返回值:该方法返回新的浮动缓冲区。 以下是举例说明切片()方法: 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 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 subsequence buffer of given FloatBuffer
// using slice() method
FloatBuffer fb2 = fb1.slice();
// print the shared subsequence buffer
System.out.println("\nshared subsequence 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");
}
}
}
Output
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 subsequence 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
实施例 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 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 subsequence buffer of given FloatBuffer
// using slice() method
FloatBuffer fb2 = fb1.slice();
fb2.put(2.34F);
fb2.put(6.34F);
// print the shared subsequence buffer
System.out.println("\nshared subsequence 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");
}
}
}
Output
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 subsequence 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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