java.nio.FloatBuffer类的duplicate()方法用于创建共享给定缓冲区内容的新浮点缓冲区。
新缓冲区的内容就是该缓冲区的内容。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。
新缓冲区的容量,限制,位置和标记值将与此缓冲区相同。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 duplicate()
返回值:此方法返回新的float缓冲区,该缓冲区带有先前的float缓冲区内容
下面是说明duplicate()方法的示例:
范例1:使用直接floatbuffer
// Java program to demonstrate
// duplicate() method
// Using direct floatbuffer
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(2, 9.61F);
fb1.rewind();
// print the Original FloatBuffer
System.out.println("Original FloatBuffer: "
+ Arrays.toString(fb1.array()));
// Creating a duplicate copy of FloatBuffer
// using duplicate() method
FloatBuffer fb2 = fb1.duplicate();
// print the duplicate copy of FloatBuffer
System.out.print("\nDuplicate FloatBuffer: "
+ Arrays.toString(fb2.array()));
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出:
Original FloatBuffer: [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] Duplicate FloatBuffer: [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
范例2:使用read-onlyfloatbuffer
// Java program to demonstrate
// duplicate() method
// using read-onlyfloatbuffer
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(2, 9.61F);
fb1.rewind();
// print the Original FloatBuffer
System.out.println("Original FloatBuffer: "
+ Arrays.toString(fb1.array()));
// Creating a read-only copy of FloatBuffer
// using asReadOnlyBuffer() method
FloatBuffer readonly = fb1.asReadOnlyBuffer();
// print the read-only copy of FloatBuffer
System.out.print("\nread-only FloatBuffer: ");
while (readonly.hasRemaining())
System.out.print(readonly.get() + ", ");
System.out.println("");
// Rewinding the readonly FloatBuffer
readonly.rewind();
// Creating a duplicate copy of FloatBuffer
// using duplicate() method
FloatBuffer fb2 = readonly.duplicate();
// print the duplicate copy of FloatBuffer
System.out.print("\nduplicate copy of read-only FloatBuffer: ");
while (fb2.hasRemaining())
System.out.print(fb2.get() + ", ");
System.out.println("");
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出:
Original FloatBuffer: [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0] read-only FloatBuffer: 8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, duplicate copy of read-only FloatBuffer: 8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
相关用法
- Java FloatBuffer asReadOnlyBuffer()用法及代码示例
- Java FloatBuffer allocate()用法及代码示例
- Java FloatBuffer compareTo()用法及代码示例
- Java FloatBuffer arrayOffset()用法及代码示例
- Java FloatBuffer hasArray()用法及代码示例
- Java FloatBuffer wrap()用法及代码示例
- Java FloatBuffer equals()用法及代码示例
- Java FloatBuffer compact()用法及代码示例
- Java FloatBuffer array()用法及代码示例
- Java FloatBuffer slice()用法及代码示例
- Java FloatBuffer limit()用法及代码示例
- Java Buffer duplicate()用法及代码示例
- Java IntBuffer duplicate()用法及代码示例
- Java ShortBuffer duplicate()用法及代码示例
- Java DoubleBuffer duplicate()用法及代码示例
注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 FloatBuffer duplicate() 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。