Java IntBuffer put()方法

Java IntBuffer put()方法

put(int i)

java.nio.IntBuffer 类的 put(int i) 方法用于将给定的int写入新创建的int缓冲区的当前位置,然后递增该位置。

语法:

public abstract IntBuffer put(int i)
Java

参数: 该方法以int值i为参数,将其写入int缓冲区。

返回值: 该方法返回这个缓冲区,其中插入了int值。

异常: 该方法会抛出以下异常。

  • BufferOverflowException- 如果这个缓冲区的当前位置不小于它的极限值。
  • ReadOnlyBufferException- 如果这个缓冲区是只读的。

下面是说明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);
        }
    }
}
Java

输出:

Original IntBuffer: [8, 9, 7]
Java

例2: 为了证明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);
        }
    }
}
Java

输出:

Trying to put the Int at the position more than its limit
Exception throws : java.nio.BufferOverflowException
Java

实例3: 为了证明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);
        }
    }
}
Java

输出:

Trying to put the Int value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException
Java

put(int index, int i)

java.nio.IntBuffer类的put(int index, int i)方法是用来将给定的int写入给定索引的缓冲区中。

语法

public abstract IntBuffer put(int index, int i)
Java

参数: 该方法接受以下参数作为参数。

  • index : 将被写入的int值的索引
  • i : 要写入的int值

返回值 :该方法返回这个缓冲区。

异常: 该方法会抛出以下异常。

  • IndexOutOfBoundsException- 如果index是负数或者不小于缓冲区的极限值。
  • ReadOnlyBufferException- 如果这个缓冲区是只读的。

下面的例子说明了put(int index, int i)方法。

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() at  index 0
            ib.put(0, 8);
  
            // putting the value in Intbuffer using put() at  index 2
            ib.put(2, 9);
  
            // putting the value in Intbuffer using put() at  index 1
            ib.put(1, 7);
  
            // rewinding the Intbuffer
            ib.rewind();
  
            // print the IntBuffer
            System.out.println("Original IntBuffer:  "
                               + Arrays.toString(ib.array()));
        }
  
        catch (IndexOutOfBoundsException e) {
            System.out.println("Exception throws : " + e);
        }
  
        catch (ReadOnlyBufferException e) {
            System.out.println("Exception throws : " + e);
        }
    }
}
Java

输出:

Original IntBuffer:  [8, 7, 9]
Java

例2: 演示IndexOutOfBoundsException。

// 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() at  index 0
            ib.put(0, 8);
  
            // putting the value in Intbuffer
            // using put() at  index 2
            ib.put(2, 9);
  
            // putting the value in Intbuffer
            // using put() at  index -1
            System.out.println("Trying to put the value"
                               + " at the negative index");
            ib.put(-1, 7);
        }
  
        catch (IndexOutOfBoundsException e) {
            System.out.println("Exception throws : " + e);
        }
  
        catch (ReadOnlyBufferException e) {
            System.out.println("Exception throws : " + e);
        }
    }
}
Java

输出:

Trying to put the value at the negative index
Exception throws : java.lang.IndexOutOfBoundsException
Java

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(0, 8);
        }
  
        catch (BufferOverflowException e) {
            System.out.println("Exception throws : " + e);
        }
  
        catch (ReadOnlyBufferException e) {
            System.out.println("Exception throws : " + e);
        }
    }
}
Java

输出:

Trying to put the Int value in read only buffer
Exception throws : java.nio.ReadOnlyBufferException
Java

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