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Legal StudiesJava 中 DoubleBuffer 的 slice() 方法
在 java.nio.DoubleBuffer 类中可以使用方法 slice() 创建一个新 DoubleBuffer，其内容是原始 DoubleBuffer 的共享子序列。如果原始缓冲是只读的，则此方法返回新 DoubleBuffer，该 DoubleBuffer 是只读的；如果原始缓冲是直接的，则返回的 DoubleBuffer 是直接的。
演示这一点的程序如下 −
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("
The 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");
}
}
}上述程序的输出如下 −
输出
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
更新于: 2019 年 7 月 30 日
92 次浏览
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