Java 中的 DoubleBuffer compareTo() 方法
可以使用 java.nio.DoubleBuffer 類中的 compareTo() 方法將緩衝區與另一緩衝區進行比較。如果緩衝區小於給定緩衝區,則此方法返回負整數;如果緩衝區等於給定緩衝區,則返回零;如果緩衝區大於給定緩衝區,則返回正整數。
下面給出了一個演示此程式的示例 −
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);
buffer1.put(7.5D);
buffer1.put(5.8D);
buffer1.rewind();
System.out.println("The first DoubleBuffer is: " + Arrays.toString(buffer1.array()));
DoubleBuffer buffer2 = DoubleBuffer.allocate(n);
buffer2.put(4.5D);
buffer2.put(1.2D);
buffer2.put(3.9D);
buffer2.put(7.5D);
buffer2.put(5.8D);
buffer2.rewind();
System.out.println("The second DoubleBuffer 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");
}
}
}上述程式的輸出如下 −
輸出
The first DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8] The second DoubleBuffer is: [4.5, 1.2, 3.9, 7.5, 5.8] Both the buffers are lexicographically equal
廣告
資料結構
網路
RDBMS
作業系統
Java
iOS
HTML
CSS
安卓
Python
C 程式設計
C++
C#
MongoDB
MySQL
Javascript
PHP