Java FloatBuffer equals()方法及示例

java.nio.FloatBuffer 类的 equals() 方法用于检查给定的缓冲区是否与另一个对象相等。

两个Float缓冲区是相等的，当且仅当。

这个方法认为两个Float元素a和b是相等的，如果（a == b）||（Float.isNaN(a) && Float.isNaN(b)）。值-0.0和+0.0被认为是相等的，与Float.equals(Object)不同。

Float缓冲器不等于任何其他类型的对象。

语法

public boolean equals(Object ob)

参数： 该方法以 ob （这个缓冲区要被比较的对象）为参数。

返回值： 当且仅当这个缓冲区等于给定的对象时，该方法返回真。

下面是说明 equals() 方法的例子。

例子 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

例子 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

例子 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