java.nio.IntBuffer类的array()方法用于返回支持此缓冲区的int数组。对该缓冲区内容的修改将导致返回数组的内容被修改,反之亦然。 Invoke()在调用此方法之前,先使用hasArray()方法,以确保此缓冲区具有可访问的后备数组
用法:
public final int[] array()
返回值:此方法返回支持此缓冲区的数组。
异常:此方法引发ReadOnlyBufferException(如果此缓冲区由数组支持,但为只读)
以下示例程序旨在说明array()方法:
范例1:
// Java program to demonstrate
// array() 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 ib = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib.put(7);
ib.put(2, 6);
ib.rewind();
// getting array from ib IntBuffer using array() method
int[] ibb = ib.array();
// printing the IntBuffer ib
System.out.println("IntBuffer: "
+ Arrays.toString(ibb));
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
}
}
输出:
IntBuffer: [7, 0, 6, 0, 0, 0, 0, 0, 0, 0]
范例2:
// Java program to demonstrate
// array() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the ib
int capacity1 = 10;
// Declaring the capacity of the ib1
int capacity2 = 5;
// Creating the IntBuffer
try {
//
// ib
//
// creating object of Intbuffer ib
// and allocating size capacity
IntBuffer ib = IntBuffer.allocate(capacity1);
// putting the value in ib
ib.put(7);
ib.put(2, 6);
ib.put(3, 7);
ib.rewind();
// print the IntBuffer
System.out.println("IntBuffer ib: "
+ Arrays.toString(ib.array()));
//
// ib1
//
// creating object of Intbuffer ib1
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity2);
// putting the value in ib1
ib1.put(1, 4);
ib1.put(2, 6);
ib1.rewind();
// print the IntBuffer
System.out.println("\nIntBuffer ib1: "
+ Arrays.toString(ib1.array()));
// Creating a read-only copy of IntBuffer
// using asReadOnlyBuffer() method
IntBuffer readOnlyib = ib.asReadOnlyBuffer();
// print the IntBuffer
System.out.print("\nReadOnlyBuffer IntBuffer: ");
while (readOnlyib.hasRemaining())
System.out.print(readOnlyib.get() + ", ");
// try to change readOnlyib
System.out.println("\n\nTrying to get the array"
+ " from ReadOnlyib for editing");
int[] ibarr = readOnlyib.array();
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception thrown: " + e);
}
}
}
输出:
IntBuffer ib: [7, 0, 6, 7, 0, 0, 0, 0, 0, 0] IntBuffer ib1: [0, 4, 6, 0, 0] ReadOnlyBuffer IntBuffer: 7, 0, 6, 7, 0, 0, 0, 0, 0, 0, Trying to get the array from ReadOnlyib for editing Exception thrown: java.nio.ReadOnlyBufferException
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注:本文由纯净天空筛选整理自nitin_sharma大神的英文原创作品 IntBuffer array() method in Java。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。