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Java FloatBuffer equals()用法及代码示例


java.nio.FloatBuffer类的equals()方法用于检查给定的缓冲区是否等于另一个对象。

当且仅当两个浮点缓冲区相等时，

  • 它们具有相同的元素类型，
  • 它们具有相同数量的剩余元素，并且
  • 其余元素的两个序列(与它们的起始位置无关)是按点排列的
    等于。

如果(a == b)||，则此方法认为两个浮点元素a和b相等。 (Float.isNaN(a)&& Float.isNaN(b))。与Float.equals(Object)不同，值-0.0和+0.0被视为相等。


浮点缓冲区不等于任何其他类型的对象。

用法:

public boolean equals(Object ob)

参数：此方法将ob(此缓冲区要与之比较的对象)作为参数。

返回值：仅当此缓冲区等于给定对象时，此方法返回true。

下面是说明equals()方法的示例：

范例1：

// Java program to demonstrate 
// equals() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the FloatBuffer 1 
        int capacity1 = 10; 
  
        // Declaring the capacity of the  FloatBuffer 2 
        int capacity2 = 10; 
  
        // Creating the FloatBuffer 
        try { 
  
            // creating object of floatbuffer 1 
            // and allocating size capacity 
            FloatBuffer fb1 = FloatBuffer.allocate(capacity1); 
  
            // creating object of floatbuffer 2 
            // and allocating size capacity 
            FloatBuffer fb2 = FloatBuffer.allocate(capacity2); 
  
            // putting the value in floatbuffer 1 
            fb1.put(8.56F); 
            fb1.put(2, 9.61F); 
            fb1.rewind(); 
  
            // putting the value in floatbuffer 2 
            fb2.put(8.56F); 
            fb2.put(2, 9.61F); 
            fb2.rewind(); 
  
            // print the FloatBuffer 1 
            System.out.println(" FloatBuffer 1:  "
                               + Arrays.toString(fb1.array())); 
  
            // print the FloatBuffer 2 
            System.out.println(" FloatBuffer 2:  "
                               + Arrays.toString(fb2.array())); 
  
            // checking the equality of both FloatBuffer 
            boolean fbb = fb1.equals(fb2); 
  
            // checking if else condition 
            if (fbb) 
                System.out.println("both are equal"); 
            else
                System.out.println("both are not equal"); 
        } 
  
        catch (IllegalArgumentException e) { 
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}
输出： 
FloatBuffer 1:  [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
FloatBuffer 2:  [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
both are equal

范例2：

// Java program to demonstrate 
// equals() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the FloatBuffer 1 
        int capacity1 = 10; 
  
        // Declaring the capacity of the  FloatBuffer 2 
        int capacity2 = 5; 
  
        // Creating the FloatBuffer 
        try { 
  
            // creating object of floatbuffer 1 
            // and allocating size capacity 
            FloatBuffer fb1 = FloatBuffer.allocate(capacity1); 
  
            // creating object of floatbuffer 2 
            // and allocating size capacity 
            FloatBuffer fb2 = FloatBuffer.allocate(capacity2); 
  
            // putting the value in floatbuffer 1 
            fb1.put(8.56F); 
            fb1.put(2, 9.61F); 
            fb1.rewind(); 
  
            // putting the value in floatbuffer 2 
            fb2.put(8.56F); 
            fb2.put(2, 9.61F); 
            fb2.rewind(); 
  
            // print the FloatBuffer 1 
            System.out.println(" FloatBuffer 1:  "
                               + Arrays.toString(fb1.array())); 
  
            // print the FloatBuffer 2 
            System.out.println(" FloatBuffer 2:  "
                               + Arrays.toString(fb2.array())); 
  
            // checking the equality of both FloatBuffer 
            boolean fbb = fb1.equals(fb2); 
  
            // checking if else condition 
            if (fbb) 
                System.out.println("both are equal"); 
            else
                System.out.println("both are not equal"); 
        } 
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}
输出： 
FloatBuffer 1:  [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
FloatBuffer 2:  [8.56, 0.0, 9.61, 0.0, 0.0]
both are not equal

范例3：

// Java program to demonstrate 
// equals() method 
  
import java.nio.*; 
import java.util.*; 
  
public class GFG { 
  
    public static void main(String[] args) 
    { 
  
        // Declaring the capacity of the FloatBuffer 1 
        int capacity1 = 10; 
  
        // Declaring the capacity of the  FloatBuffer 2 
        int capacity2 = 10; 
  
        // Creating the FloatBuffer 
        try { 
  
            // creating object of floatbuffer 1 
            // and allocating size capacity 
            FloatBuffer fb1 = FloatBuffer.allocate(capacity1); 
  
            // creating object of floatbuffer 2 
            // and allocating size capacity 
            FloatBuffer fb2 = FloatBuffer.allocate(capacity2); 
  
            // putting the value in floatbuffer 1 
            fb1.put(8.56F); 
            fb1.put(2, 9.61F); 
            fb1.rewind(); 
  
            // putting the value in floatbuffer 2 
            fb2.put(8.56F); 
            fb2.put(2, 9.61F); 
            fb2.put(3, 7.861F); 
            fb2.put(4, 4.31F); 
            fb2.rewind(); 
  
            // print the FloatBuffer 1 
            System.out.println(" FloatBuffer 1:  "
                               + Arrays.toString(fb1.array())); 
  
            // print the FloatBuffer 2 
            System.out.println(" FloatBuffer 2:  "
                               + Arrays.toString(fb2.array())); 
  
            // checking the equality of both FloatBuffer 
            boolean fbb = fb1.equals(fb2); 
  
            // checking if else condition 
            if (fbb) 
                System.out.println("both are equal"); 
            else
                System.out.println("both are not equal"); 
        } 
        catch (IllegalArgumentException e) { 
  
            System.out.println("IllegalArgumentException catched"); 
        } 
  
        catch (ReadOnlyBufferException e) { 
  
            System.out.println("ReadOnlyBufferException catched"); 
        } 
    } 
}
输出： 
FloatBuffer 1:  [8.56, 0.0, 9.61, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0]
FloatBuffer 2:  [8.56, 0.0, 9.61, 7.861, 4.31, 0.0, 0.0, 0.0, 0.0, 0.0]
both are not equal


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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 FloatBuffer equals() method in Java with Examples。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。