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

 線上演示

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

更新日期: 30-07-2019

103 次瀏覽

開啟您的 職業

透過完成課程獲得認證

開始
廣告