Java 中的 CharBuffer compareTo() 方法
java 8programmingobject oriented programming
可以使用 java.nio.CharBuffer 类中的 compareTo() 方法将一个缓冲区与另一个缓冲区进行比较。如果缓冲区小于给定的缓冲区,则此方法返回负整数;如果缓冲区等于给定的缓冲区,则返回零;如果缓冲区大于给定的缓冲区,则返回正整数。
下面给出了一个演示此操作的程序 −
示例
import java.nio.*; import java.util.*; public class Demo { public static void main(String[] args) { int n = 5; try { CharBuffer buffer1 = CharBuffer.allocate(n); buffer1.put('A'); buffer1.put('P'); buffer1.put('P'); buffer1.put('L'); buffer1.put('E'); buffer1.rewind(); System.out.println("The first CharBuffer is: " + Arrays.toString(buffer1.array())); CharBuffer buffer2 = CharBuffer.allocate(n); buffer2.put('A'); buffer2.put('P'); buffer2.put('P'); buffer2.put('L'); buffer2.put('E'); buffer2.rewind(); System.out.println("The second CharBuffer is: " + Arrays.toString(buffer2.array())); int val = buffer1.compareTo(buffer2); if (val == 0) System.out.println("
Both the buffers are lexicographically equal"); else if (val > 0) System.out.println("
The first buffer is lexicographically greater than the second buffer"); else System.out.println("
The second buffer is lexicographically greater than the first buffer"); } catch (IllegalArgumentException e) { System.out.println("Error!!! IllegalArgumentException"); } catch (ReadOnlyBufferException e) { System.out.println("Error!!! ReadOnlyBufferException"); } } }
输出
The first CharBuffer is: [A, P, P, L, E] The second CharBuffer is: [A, P, P, L, E] Both the buffers are lexicographically equal