Java中的DoubleBuffer slice()方法
可以使用slice()类java.nio.DoubleBuffer中的方法创建一个新的DoubleBuffer，其内容作为原始DoubleBuffer的共享子序列。如果原始缓冲区是只读的，则此方法返回只读的新DoubleBuffer；如果原始缓冲区是直接的，则此方法返回Direct。
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 {
DoubleBuffer buffer1 = DoubleBuffer.allocate(n);
buffer1.put(4.5D);
buffer1.put(1.2D);
buffer1.put(3.9D);
System.out.println("The Original DoubleBuffer is: " + Arrays.toString(buffer1.array()));
System.out.println("The position is: " + buffer1.position());
System.out.println("The capacity is: " + buffer1.capacity());
DoubleBuffer buffer2 = buffer1.slice();
System.out.println("\nThe Subsequence DoubleBuffer is: " + Arrays.toString(buffer2.array()));
System.out.println("The position is: " + buffer2.position());
System.out.println("The capacity is: " + buffer2.capacity());
} catch (IllegalArgumentException e) {
System.out.println("Error!!! IllegalArgumentException");
} catch (ReadOnlyBufferException e) {
System.out.println("Error!!! ReadOnlyBufferException");
}
}
}上面程序的输出如下-
输出结果
The Original DoubleBuffer is: [4.5, 1.2, 3.9, 0.0, 0.0] The position is: 3 The capacity is: 5 The Subsequence DoubleBuffer is: [4.5, 1.2, 3.9, 0.0, 0.0] The position is: 0 The capacity is: 2