get()
java.nio.IntBuffer类的get()方法用于读取给定缓冲区当前位置的int,然后递增该位置。
用法:
public abstract int get()
返回值:此方法返回缓冲区当前位置的int值。
抛出:此方法抛出BufferUnderflowException-如果缓冲区的当前位置不小于其限制,则抛出此异常。
下面是说明get()方法的示例:
范例1:
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 5;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib.put(8);
ib.put(9);
ib.put(1);
ib.rewind();
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
// Reads the Int at this buffer's current position
// using get() method
int value = ib.get();
// print the Int value
System.out.println("Int Value:" + value);
// Reads the Int at this buffer's next position
// using get() method
int value1 = ib.get();
// print the Int value
System.out.print("Next Int Value:" + value1);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws:" + e);
}
}
}
输出:
Original IntBuffer: [8, 9, 1, 0, 0] Int Value:8 Next Int Value:9
范例2:演示java.nio.BufferUnderflowException
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 3;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib.put(8);
ib.put(9);
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
// Reads the Int at this buffer's current position
// using get() method
int value = ib.get();
// print the Int value
System.out.println("Int Value:" + value);
// Reads the Int at this buffer's next position
// using get() method
System.out.print("Since the buffer current position is incremented");
System.out.print(" to greater than its limit ");
int value1 = ib.get();
// print the Int value
System.out.print("Next Int Value:" + value1);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (ReadOnlyBufferException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws:" + e);
}
}
}
输出:
Original IntBuffer: [8, 9, 0] Int Value:0 Since the buffer current position is incremented to greater than its limit Exception throws:java.nio.BufferUnderflowException
get(int index)
IntBuffer的get(int index)方法用于读取指定索引处的文章。
用法:
public abstract int get(int index)
参数:此方法将索引(将从中读取int的索引)作为参数。
返回值:此方法返回给定索引处的int值。
异常:此方法引发IndexOutOfBoundsException。如果index为负或不小于缓冲区的限制,则抛出此异常。
以下示例说明了get(int index)方法:
范例1:
// Java program to demonstrate
// get(int index) method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 3;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib.put(8);
ib.put(9);
ib.put(6);
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
// Reads the Int at the index 0 of the Intbuffer
// using get() method
int value0 = ib.get(0);
// print the Int value
System.out.println("Int Value at index 0:" + value0);
// Reads the Int at the index 1 of the Intbuffer
// using get() method
int value1 = ib.get(1);
// print the Int value
System.out.println("Int Value at index 1:" + value1);
// Reads the Int at the index 2 of the Intbuffer
// using get() method
int value2 = ib.get(2);
// print the Int value
System.out.println("Int Value at index 2:" + value2);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (IndexOutOfBoundsException e) {
System.out.println("ReadOnlyBufferException catched");
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws:" + e);
}
}
}
输出:
Original IntBuffer: [8, 9, 6] Int Value at index 0:8 Int Value at index 1:9 Int Value at index 2:6
范例2:演示IndexOutOfBoundsException
// Java program to demonstrate
// get() method
import java.nio.*;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// Declaring the capacity of the IntBuffer
int capacity = 3;
// Creating the IntBuffer
try {
// creating object of Intbuffer
// and allocating size capacity
IntBuffer ib = IntBuffer.allocate(capacity);
// putting the value in Intbuffer
ib.put(6);
ib.put(8);
ib.put(12);
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
// Reads the Int at the index 0 of the Intbuffer
// using get() method
int value0 = ib.get(0);
// print the Int value
System.out.println("Int Value at index 0:" + value0);
// Reads the Int at the index 1 of the Intbuffer
// using get() method
int value1 = ib.get(1);
// print the Int value
System.out.println("Int Value at index 1:" + value1);
// Reads the Int at the index 2 of the Intbuffer
// using get() method
System.out.println("Trying to get the Int"
+ " of index greater than its limit ");
int value2 = ib.get(4);
// print the Int value
System.out.println("Int Value at index 2:" + value2);
}
catch (IllegalArgumentException e) {
System.out.println("IllegalArgumentException catched");
}
catch (IndexOutOfBoundsException e) {
System.out.println("Exception thrown:" + e);
}
catch (BufferUnderflowException e) {
System.out.println("Exception throws:" + e);
}
}
}
输出:
Original IntBuffer: [6, 8, 12] Int Value at index 0:6 Int Value at index 1:8 Trying to get the Int of index greater than its limit Exception thrown:java.lang.IndexOutOfBoundsException
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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 get() methods in Java | Set 1。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。