java.nio.FloatBuffer类的flip()方法用于翻转此缓冲区。通过翻转此缓冲区,这意味着将缓冲区修剪到当前位置,然后将位置更改为零。在此过程中,如果缓冲区上有任何标记,则该标记将被自动丢弃。
用法:
public final FloatBuffer flip()
返回值:此方法返回翻转的FloatBuffer实例。
下面是说明flip()方法的示例:
范例1:
// Java program to demonstrate
// flip() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declare and initialize
// the double array
float[] db
= { 10.56f, 20.34f, 30.78f };
// wrap the float array
// into FloatBuffer
// using wrap() method
FloatBuffer floatBuffer
= FloatBuffer.wrap(db);
// set position at index 1
floatBuffer.position(1);
// print the buffer
System.out.println(
"Buffer before flip:"
+ Arrays.toString(
floatBuffer.array())
+ "\nPosition:"
+ floatBuffer.position()
+ "\nLimit:"
+ floatBuffer.limit());
// Flip the Buffer
// using flip() method
floatBuffer.flip();
// print the buffer
System.out.println(
"\nBuffer after flip:"
+ Arrays.toString(
floatBuffer.array())
+ "\nPosition:"
+ floatBuffer.position()
+ "\nLimit:"
+ floatBuffer.limit());
}
}
输出:
Buffer before flip:[10.56, 20.34, 30.78] Position:1 Limit:3 Buffer after flip:[10.56, 20.34, 30.78] Position:0 Limit:1
范例2:
// Java program to demonstrate
// flip() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// defining and allocating FloatBuffer
// using allocate() method
FloatBuffer floatBuffer
= FloatBuffer.allocate(4);
// put float value in FloatBuffer
// using put() method
floatBuffer.put(20.4f);
floatBuffer.put(34.5f);
// set position at index 1
floatBuffer.position(1);
// print the buffer
System.out.println(
"Buffer before flip:"
+ Arrays.toString(
floatBuffer.array())
+ "\nPosition:"
+ floatBuffer.position()
+ "\nLimit:"
+ floatBuffer.limit());
// Flip the Buffer
// using flip() method
floatBuffer.flip();
// print the buffer
System.out.println(
"\nBuffer after flip:"
+ Arrays.toString(
floatBuffer.array())
+ "\nPosition:"
+ floatBuffer.position()
+ "\nLimit:"
+ floatBuffer.limit());
}
}
输出:
Buffer before flip:[20.4, 34.5, 0.0, 0.0] Position:1 Limit:4 Buffer after flip:[20.4, 34.5, 0.0, 0.0] Position:0 Limit:1
参考: https://docs.oracle.com/javase/9/docs/api/java/nio/FloatBuffer.html#flip-
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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 flip() methods 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。