Java 中的 IntBuffer get()方法| Set 1
原文:https://www . geesforgeks . org/int buffer-get-methods-in-Java-set-1/
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。
语法:
public abstract int get()
返回值:该方法返回缓冲区当前位置的 int 值。
抛出:此方法抛出bufferenderflow exception–如果缓冲区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:
实施例 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);
}
}
}
Output:
Original IntBuffer: [8, 9, 1, 0, 0]
Int Value: 8
Next Int Value: 9
示例 2: 演示 Java . nio . bufferenderflow exception
// 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);
}
}
}
Output:
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 索引)
IntBuffer 的 get(int index) 方法用于读取指定索引处的文章。
语法:
public abstract int get(int index)
参数:该方法以索引(从中读取 int 的索引)为参数。
返回值:该方法返回给定索引处的整数值。
异常:此方法抛出indexout of boundsexception。如果索引为负或不小于缓冲区的限制，则会引发此异常。
以下是说明 get(int index)方法的示例:
实施例 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);
}
}
}
Output:
Original IntBuffer: [8, 9, 6]
Int Value at index 0: 8
Int Value at index 1: 9
Int Value at index 2: 6
示例 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);
}
}
}
Output:
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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