Java中的CharBuffer compact()方法
可以使用java.nio.CharBuffer类中的compact()方法压缩缓冲区。此方法不需要参数，它返回的新压缩CharBuffer的内容与原始缓冲区相同。如果缓冲区是只读的，则抛出ReadOnlyBufferException。
演示此的程序如下所示-
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('B');
buffer.put('C');
System.out.println("The Original CharBuffer is: " + Arrays.toString(buffer.array()));
System.out.println("The position is: " + buffer.position());
System.out.println("The limit is: " + buffer.limit());
CharBuffer bufferCompact = buffer.compact();
System.out.println("\nThe Compacted CharBuffer is: " + Arrays.toString(bufferCompact.array()));
System.out.println("The position is: " + bufferCompact.position());
System.out.println("The limit is: " + bufferCompact.limit());
} catch (IllegalArgumentException e) {
System.out.println("Error!!! IllegalArgumentException");
} catch (ReadOnlyBufferException e) {
System.out.println("Error!!! ReadOnlyBufferException");
}
}
}输出结果
The Original CharBuffer is: [A, B, C, , ] The position is: 3 The limit is: 5 The Compacted CharBuffer is: [, , C, , ] The position is: 2 The limit is: 5