Java中的 IntBuffer put() 方法 |设置 1

放（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 缓冲区中，然后将该位置递增。

句法：

public abstract IntBuffer put(int i)

参数：此方法将 int 值i作为要写入 int 缓冲区的参数。

返回值：此方法返回此缓冲区，其中插入了 int 值。

异常：此方法抛出以下异常：

BufferOverflowException-如果此缓冲区的当前位置不小于其限制
ReadOnlyBufferException-如果此缓冲区是只读的

以下是说明 put(int i) 方法的示例：

示例 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]

示例 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

放（int索引，int i）

Java.nio.IntBuffer 类的 put(int index, int i) 方法用于将给定的 int 写入到给定索引处的缓冲区中。

句法：

public abstract IntBuffer put(int index, int i)

参数：此方法采用以下参数作为参数：

index ：将写入 int 的索引
i : 要写入的 int 值

返回值：此方法返回此缓冲区。

异常：此方法抛出以下异常：

IndexOutOfBoundsException-如果 index 为负数或不小于缓冲区的限制
ReadOnlyBufferException-如果此缓冲区是只读的

以下是说明 put(int index, int i) 方法的示例：

示例 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);
        }
    }
}

输出：

Original IntBuffer:  [8, 7, 9]

示例 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);
        }
    }
}

输出：

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

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(0, 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