Java IntBuffer get()方法
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： 该方法抛出 BufferUnderflowException - 如果缓冲区的当前位置没有小于它的极限值，那么就会抛出这个异常。
下面是说明get()方法的例子。
例子 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: 8Next Int Value: 9
实例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: 0Since the buffer current position is incremented to greater than its limit Exception throws : java.nio.BufferUnderflowException
get(int index)
IntBuffer的get(int index)方法是用来读取指定索引的文章的。
语法:
public abstract int get(int index)
参数： 该方法以 index （将读取int的索引）为参数。
返回值： 该方法返回给定索引处的int值。
异常： 该方法抛出 IndexOutOfBoundsException。 如果索引是负数或者不小于缓冲区的限制，就会抛出这个异常。
下面是说明get(int index)方法的例子。
例子 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: 8Int Value at index 1: 9Int Value at index 2: 6
实例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: 6Int Value at index 1: 8Trying to get the Int of index greater than its limit Exception thrown: java.lang.IndexOutOfBoundsException
