Java 中的 IntBuffer put()方法| Set 1
原文:https://www . geesforgeks . org/int buffer-put-methods-in-Java-set-1/
put(int i)
java.nio.IntBuffer 类的 put(int i) 方法用于将给定的 int 写入当前位置新创建的 int 缓冲区，然后递增该位置。
语法:
public abstract IntBuffer put(int i)
参数:该方法将 int 值 i 作为参数写入 int 缓冲区。
返回值:这个方法返回这个缓冲区，其中插入了 int 值。
异常:此方法抛出以下异常:
- Bufferovflowexception- If the current position of this buffer is not less than its limit
- ReadonlyBufferenexception- If this buffer is read-only,
下面是举例说明 put(int i)方法的例子:
例 1:
// Java program to demonstrate
// put() 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 using put() method
ib.put(8);
ib.put(9);
ib.put(7);
ib.rewind();
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
}
catch (BufferOverflowException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出:
Original IntBuffer: [8, 9, 7]
例 2: 演示 BufferOverflowException。
// Java program to demonstrate
// put() 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 using put() method
ib.put(8);
ib.put(9);
ib.put(7);
System.out.println("Trying to put the Int at the "
+ "position more than its limit");
ib.put(7);
// rewind the Intbuffer
ib.rewind();
// print the IntBuffer
System.out.println("Original IntBuffer: "
+ Arrays.toString(ib.array()));
}
catch (BufferOverflowException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出:
Trying to put the Int at the position more than its limit
Exception throws : java.nio.BufferOverflowException
示例 3: 演示 ReadOnlyBufferException。
// Java program to demonstrate
// put() 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 using allocate() method
IntBuffer ib = IntBuffer.allocate(capacity);
// Creating a read-only copy of IntBuffer
// using asReadOnlyBuffer() method
IntBuffer ib1 = ib.asReadOnlyBuffer();
System.out.println("Trying to put the Int value"
+ " in read only buffer");
// putting the value in readonly Intbuffer
// using put() method
ib1.put(8);
}
catch (BufferOverflowException e) {
System.out.println("Exception throws : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception throws : " + e);
}
}
}
输出:
Trying to put the Int value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException
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