Java的IntBuffer equals() 方法
Java.nio.IntBuffer类的equals()方法用于检查给定的缓冲区是否等于另一个对象。
两个 int 缓冲区相等当且仅当，
- 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
- 独立于它们的起始位置考虑的剩余元素的两个序列是逐点的
平等的。
该方法认为两个 int 元素 a 和 b 相等 if (a == b) || (Int.isNaN(a) && Int.isNaN(b))。与 Int.equals(Object) 不同，值 -0 和 +0 被认为是相等的。
int 缓冲区不等于任何其他类型的对象。
句法：
public boolean equals(Object ob)参数：此方法采用ob ，即要与此缓冲区进行比较的对象，作为参数。
返回值：当且仅当此缓冲区等于给定对象时，此方法才返回true 。
下面是说明equals()方法的示例：
示例 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 IntBuffer 1
int capacity1 = 10;
// Declaring the capacity of the IntBuffer 2
int capacity2 = 10;
// Creating the IntBuffer
try {
// creating object of Intbuffer 1
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity1);
// creating object of Intbuffer 2
// and allocating size capacity
IntBuffer ib2 = IntBuffer.allocate(capacity2);
// putting the value in Intbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Intbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.rewind();
// print the IntBuffer 1
System.out.println(" IntBuffer 1: "
+ Arrays.toString(ib1.array()));
// print the IntBuffer 2
System.out.println(" IntBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both IntBuffer
boolean ibb = ib1.equals(ib2);
// checking if else condition
if (ibb)
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：
IntBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
IntBuffer 2: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
Both are equal
示例 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 IntBuffer 1
int capacity1 = 10;
// Declaring the capacity of the IntBuffer 2
int capacity2 = 5;
// Creating the IntBuffer
try {
// creating object of Intbuffer 1
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity1);
// creating object of Intbuffer 2
// and allocating size capacity
IntBuffer ib2 = IntBuffer.allocate(capacity2);
// putting the value in Intbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Intbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.rewind();
// print the IntBuffer 1
System.out.println(" IntBuffer 1: "
+ Arrays.toString(ib1.array()));
// print the IntBuffer 2
System.out.println(" IntBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both IntBuffer
boolean ibb = ib1.equals(ib2);
// checking if else condition
if (ibb)
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：
IntBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
IntBuffer 2: [8, 0, 9, 0, 0]
Both are not equal
示例 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 IntBuffer 1
int capacity1 = 10;
// Declaring the capacity of the IntBuffer 2
int capacity2 = 10;
// Creating the IntBuffer
try {
// creating object of Intbuffer 1
// and allocating size capacity
IntBuffer ib1 = IntBuffer.allocate(capacity1);
// creating object of Intbuffer 2
// and allocating size capacity
IntBuffer ib2 = IntBuffer.allocate(capacity2);
// putting the value in Intbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Intbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.put(3, 7);
ib2.put(4, 4);
ib2.rewind();
// print the IntBuffer 1
System.out.println(" IntBuffer 1: "
+ Arrays.toString(ib1.array()));
// print the IntBuffer 2
System.out.println(" IntBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both IntBuffer
boolean ibb = ib1.equals(ib2);
// checking if else condition
if (ibb)
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：
IntBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
IntBuffer 2: [8, 0, 9, 7, 4, 0, 0, 0, 0, 0]
Both are not equal