Java IntBuffer slice()方法

java.nio.IntBuffer 类的 slice() 方法用于创建一个 新的int缓冲区 ，其内容是给定缓冲区内容的一个共享子序列。

新缓冲区的内容将从这个缓冲区的当前位置开始。这个缓冲区的内容的变化将在新的缓冲区中可见，反之亦然。两个缓冲区的位置、极限和标记值将是独立的。新缓冲区的位置将是0，它的容量和极限将是这个缓冲区中剩余的整数的数量，它的标记将是未定义的。新的缓冲区将是直接的，当且仅当这个缓冲区是直接的，它将是只读的，当且仅当这个缓冲区是只读的。

语法

public abstract IntBuffer slice()

返回值： 该方法返回 新的int buffer。

下面是一些例子来说明slice()方法。

例子 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 IntBuffer        int capacity = 10;         // Creating the IntBuffer        try {             // creating object of intbuffer            // and allocating size capacity            IntBuffer ib1 = IntBuffer.allocate(capacity);             // putting the value in intbuffer            ib1.put(8);            ib1.put(9);             // print the IntBuffer            System.out.println("Original IntBuffer: "                               + Arrays.toString(ib1.array()));             // print the IntBuffer position            System.out.println("position: " + ib1.position());             // print the IntBuffer capacity            System.out.println("capacity: " + ib1.capacity());             // Creating a shared subsequence buffer of given IntBuffer            // using slice() method            IntBuffer ib2 = ib1.slice();             // print the shared subsequence buffer            System.out.println("shared subsequence IntBuffer: "                               + Arrays.toString(ib2.array()));             // print the IntBuffer position            System.out.println("position: " + ib2.position());             // print the IntBuffer capacity            System.out.println("capacity: " + ib2.capacity());        }         catch (IllegalArgumentException e) {            System.out.println("IllegalArgumentException catched");        }         catch (ReadOnlyBufferException e) {            System.out.println("ReadOnlyBufferException catched");        }    }}

输出

Original IntBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]position: 2capacity: 10shared subsequence IntBuffer: [8, 9, 0, 0, 0, 0, 0, 0, 0, 0]position: 0capacity: 8

例子 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 IntBuffer        int capacity = 10;         // Creating the IntBuffer        try {             // creating object of intbuffer            // and allocating size capacity            IntBuffer ib1 = IntBuffer.allocate(capacity);             // putting the value in floatbuffer            ib1.put(8);            ib1.put(9);            ib1.put(5);            ib1.put(3);             // print the IntBuffer            System.out.println("Original IntBuffer: "                               + Arrays.toString(ib1.array()));             // print the IntBuffer position            System.out.println("position: " + ib1.position());             // print the IntBuffer capacity            System.out.println("capacity: " + ib1.capacity());             // Creating a shared subsequence buffer of given IntBuffer            // using slice() method            IntBuffer ib2 = ib1.slice();            ib2.put(2);            ib2.put(6);             // print the shared subsequence buffer            System.out.println("shared subsequence IntBuffer: "                               + Arrays.toString(ib2.array()));             // print the IntBuffer position            System.out.println("position: " + ib2.position());             // print the IntBuffer capacity            System.out.println("capacity: " + ib2.capacity());        }         catch (IllegalArgumentException e) {             System.out.println("IllegalArgumentException catched");        }         catch (ReadOnlyBufferException e) {             System.out.println("ReadOnlyBufferException catched");        }    }}

输出

Original IntBuffer: [8, 9, 5, 3, 0, 0, 0, 0, 0, 0]position: 4capacity: 10shared subsequence IntBuffer: [8, 9, 5, 3, 2, 6, 0, 0, 0, 0]position: 2capacity: 6