CharBuffer 的 get() 方法在 Java 中
在 java.nio.CharBuffer 類中,使用 get() 方法會先讀取緩衝區的當前位置的值,然後再將其增加。此方法返回當前緩衝區位置的值。此外,如果發生容量不足情況,將會丟擲 BufferUnderflowException。
展示這一點的程式如下 -
示例
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { CharBuffer buffer = CharBuffer.allocate(n); buffer.put('A'); buffer.put('P'); buffer.put('P'); buffer.put('L'); buffer.put('E'); buffer.rewind(); System.out.println("The CharBuffer is: " + Arrays.toString(buffer.array())); char val1 = buffer.get(); System.out.println("
The value at current position of CharBuffer is: " + val1); char val2 = buffer.get(); System.out.println("The value at next position of CharBuffer is: " + val2); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } catch (BufferUnderflowException e) { System.out.println("Error!!! BufferUnderflowException"); } } }
輸出
The CharBuffer is: [A, P, P, L, E] The value at current position of CharBuffer is: A The value at next position of CharBuffer is: P
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