Java中的CharBuffer arrayOffset()方法
使用arrayOffset()类java.nio.CharBuffer中的方法获得缓冲区数组内部缓冲区的第一个元素的偏移量。如果数组支持的缓冲区是只读的，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(5);
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()));
System.out.println("The arrayOffset is: " + buffer.arrayOffset());
} catch (IllegalArgumentException e) {
System.out.println("Error!!! IllegalArgumentException");
} catch (ReadOnlyBufferException e) {
System.out.println("Error!!! ReadOnlyBufferException");
}
}
}输出结果
The CharBuffer is: [A, P, P, L, E] The arrayOffset is: 0