Java中的FloatBuffer slice（）方法及其示例-yiteyi-C++库

这个 切片（） 方法 JAVA尼奥。浮动缓冲区 类用于创建 新型浮点缓冲器 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此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。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点数，其标记将未定义。当且仅当此缓冲区是直接缓冲区时，新缓冲区将是直接缓冲区；当且仅当此缓冲区是只读缓冲区时，新缓冲区将是只读缓冲区。

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语法：

public abstract FloatBuffer slice()

返回值： 此方法返回 新的浮动缓冲区。 下面是说明slice（）方法的示例： 例1：

JAVA

                         // 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(                                     "position:  "                                     + fb1.position());                       
           
                                                 // print the FloatBuffer capacity                       
                                                 System.out.println(                                     "capacity:  "                                     + 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(                                     "shared subsequence FloatBuffer: "                       
                                                 + Arrays.toString(fb2.array()));                       
           
                                                 // print the FloatBuffer position                       
                                                 System.out.println(                                     "position:  "                                     + fb2.position());                       
           
                                                 // print the FloatBuffer capacity                       
                                                 System.out.println(                                     "capacity:  "                                     + 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:  2capacity:  10shared subsequence FloatBuffer: [8.56, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]position:  0capacity:  8

例2：

JAVA

                         // 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(                                     "position:  "                                     + fb1.position());                       
           
                                                 // print the FloatBuffer capacity                       
                                                 System.out.println(                                     "capacity:  "                                     + 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(                                     "shared subsequence FloatBuffer: "                       
                                                 + Arrays.toString(fb2.array()));                       
           
                                                 // print the FloatBuffer position                       
                                                 System.out.println(                                     "position:  "                                     + fb2.position());                       
           
                                                 // print the FloatBuffer capacity                       
                                                 System.out.println(                                     "capacity:  "                                     + 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:  4capacity:  10shared subsequence FloatBuffer: [8.56, 9.61, 0.56, 3.61, 2.34, 6.34, 0.0, 0.0, 0.0, 0.0]position:  2capacity:  6

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