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Java IntBuffer compareTo()用法及代码示例


java.nio.IntBuffer类的compareTo()方法用于将一个缓冲区与另一个缓冲区进行比较。通过按字典顺序比较两个int缓冲区的其余元素序列来比较两个int缓冲区，而不考虑每个序列在其相应缓冲区中的开始位置。成对的int元素就像调用Int.compare(int，int)一样进行比较，只是将-0和0视为相等。此方法认为Int.NaN等于其自身，并且大于所有其他int值(包括Int.POSITIVE_INFINITY)。 int缓冲区与任何其他类型的对象都不具有可比性。

用法:

public int compareTo(IntBuffer that)

参数：此方法将intbuffer对象作为参数，将与该缓冲区进行比较。


返回值：由于此缓冲区小于，等于或大于给定的缓冲区，因此此方法返回负整数，零或正整数。

以下示例程序旨在说明compareTo()方法：

范例1：当两个IntBuffer相等时。

// Java program to demonstrate 
// compareTo() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the ib 
        int capacity1 = 3; 
  
        // Creating the IntBuffer 
        try { 
  
            // creating object of Intbuffer ib 
            // and allocating size capacity 
            IntBuffer ib = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib 
            ib.put(9); 
            ib.put(7); 
            ib.put(4); 
  
            // revind the Int buffer 
            ib.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib: "
                               + Arrays.toString(ib.array())); 
  
            // creating object of Intbuffer ib1 
            // and allocating size capacity 
            IntBuffer ib1 = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib1 
            ib1.put(9); 
            ib1.put(7); 
            ib1.put(4); 
  
            // revind the Int buffer 
            ib1.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib1: "
                               + Arrays.toString(ib1.array())); 
  
            // compare both buffer and store the value into integer 
            int i = ib.compareTo(ib1); 
  
            // if else condition 
            if (i == 0) 
                System.out.println("\nBoth buffer are lexicographically equal"); 
            else if (i >= 0) 
                System.out.println("\nib is lexicographically greater than ib1"); 
            else
                System.out.println("\nib is lexicographically less than ib1"); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("Exception throws : " + e); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("Exception throws : " + e); 
        } 
    } 
}
输出： 
IntBuffer ib: [9, 7, 4]
IntBuffer ib1: [9, 7, 4]

Both buffer are lexicographically equal

范例2：当此IntBuffer大于传递的IntBuffer时

// Java program to demonstrate 
// compareTo() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the ib 
        int capacity1 = 3; 
  
        // Creating the IntBuffer 
        try { 
  
            // creating object of Intbuffer ib 
            // and allocating size capacity 
            IntBuffer ib = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib 
            ib.put(9); 
            ib.put(7); 
            ib.put(4); 
  
            // revind the Int buffer 
            ib.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib: "
                               + Arrays.toString(ib.array())); 
  
            // creating object of Intbuffer ib1 
            // and allocating size capacity 
            IntBuffer ib1 = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib1 
            ib1.put(8); 
            ib1.put(7); 
            ib1.put(4); 
  
            // revind the Int buffer 
            ib1.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib1: "
                               + Arrays.toString(ib1.array())); 
  
            // compare both buffer and store the value into integer 
            int i = ib.compareTo(ib1); 
  
            // if else condition 
            if (i == 0) 
                System.out.println("\nBoth buffer are lexicographically equal"); 
            else if (i >= 0) 
                System.out.println("\nib is lexicographically greater than ib1"); 
            else
                System.out.println("\nib is lexicographically less than ib1"); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("Exception throws : " + e); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("Exception throws : " + e); 
        } 
    } 
}
输出： 
IntBuffer ib: [9, 7, 4]
IntBuffer ib1: [8, 7, 4]

ib is lexicographically greater than ib1

示例3:当此IntBuffer小于传递的IntBuffer时。

// Java program to demonstrate 
// compareTo() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the ib 
        int capacity1 = 3; 
  
        // Creating the IntBuffer 
        try { 
  
            // creating object of Intbuffer ib 
            // and allocating size capacity 
            IntBuffer ib = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib 
            ib.put(8); 
            ib.put(7); 
            ib.put(4); 
  
            // revind the Int buffer 
            ib.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib: "
                               + Arrays.toString(ib.array())); 
  
            // creating object of Intbuffer ib1 
            // and allocating size capacity 
            IntBuffer ib1 = IntBuffer.allocate(capacity1); 
  
            // putting the value in ib1 
            ib1.put(9); 
            ib1.put(7); 
            ib1.put(4); 
  
            // revind the Int buffer 
            ib1.rewind(); 
  
            // print the IntBuffer 
            System.out.println("IntBuffer ib1: "
                               + Arrays.toString(ib1.array())); 
  
            // compare both buffer and store the value into integer 
            int i = ib.compareTo(ib1); 
  
            // if else condition 
            if (i == 0) 
                System.out.println("\nBoth buffer are lexicographically equal"); 
            else if (i >= 0) 
                System.out.println("\nib is lexicographically greater than ib1"); 
            else
                System.out.println("\nib is lexicographically less than ib1"); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("Exception throws : " + e); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("Exception throws : " + e); 
        } 
    } 
}
输出： 
IntBuffer ib: [8, 7, 4]
IntBuffer ib1: [9, 7, 4]

ib is lexicographically less than ib1


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注：本文由纯净天空筛选整理自nitin_sharma大神的英文原创作品 IntBuffer compareTo() method in Java。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。