Java中的 LongBuffer equals() 方法
Java.nio.LongBuffer类的equals()方法用于检查给定缓冲区是否等于另一个对象。
当且仅当，两个 Long 缓冲区相等
- 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
- 剩余元素的两个序列，独立于它们的起始位置考虑，是 poLongwise
平等的。
此方法认为两个 Long 元素 a 和 b 相等 if (a == b) || (Long.isNaN(a) && Long.isNaN(b))。与 Long.equals(Object) 不同，值 -0 和 +0 被认为是相等的。
Long 缓冲区不等于任何其他类型的对象。
句法：
public boolean equals(Object ob)参数：此方法将ob （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，此方法返回true 。
以下是说明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 LongBuffer 1
int capacity1 = 10;
// Declaring the capacity of the LongBuffer 2
int capacity2 = 10;
// Creating the LongBuffer
try {
// creating object of Longbuffer 1
// and allocating size capacity
LongBuffer ib1 = LongBuffer.allocate(capacity1);
// creating object of Longbuffer 2
// and allocating size capacity
LongBuffer ib2 = LongBuffer.allocate(capacity2);
// putting the value in Longbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Longbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.rewind();
// prLong the LongBuffer 1
System.out.println(" LongBuffer 1: "
+ Arrays.toString(ib1.array()));
// prLong the LongBuffer 2
System.out.println(" LongBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both LongBuffer
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：
LongBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
LongBuffer 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 LongBuffer 1
int capacity1 = 10;
// Declaring the capacity of the LongBuffer 2
int capacity2 = 5;
// Creating the LongBuffer
try {
// creating object of Longbuffer 1
// and allocating size capacity
LongBuffer ib1 = LongBuffer.allocate(capacity1);
// creating object of Longbuffer 2
// and allocating size capacity
LongBuffer ib2 = LongBuffer.allocate(capacity2);
// putting the value in Longbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Longbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.rewind();
// prLong the LongBuffer 1
System.out.println(" LongBuffer 1: "
+ Arrays.toString(ib1.array()));
// prLong the LongBuffer 2
System.out.println(" LongBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both LongBuffer
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：
LongBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
LongBuffer 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 LongBuffer 1
int capacity1 = 10;
// Declaring the capacity of the LongBuffer 2
int capacity2 = 10;
// Creating the LongBuffer
try {
// creating object of Longbuffer 1
// and allocating size capacity
LongBuffer ib1 = LongBuffer.allocate(capacity1);
// creating object of Longbuffer 2
// and allocating size capacity
LongBuffer ib2 = LongBuffer.allocate(capacity2);
// putting the value in Longbuffer 1
ib1.put(8);
ib1.put(2, 9);
ib1.rewind();
// putting the value in Longbuffer 2
ib2.put(8);
ib2.put(2, 9);
ib2.put(3, 7);
ib2.put(4, 4);
ib2.rewind();
// prLong the LongBuffer 1
System.out.println(" LongBuffer 1: "
+ Arrays.toString(ib1.array()));
// prLong the LongBuffer 2
System.out.println(" LongBuffer 2: "
+ Arrays.toString(ib2.array()));
// checking the equality of both LongBuffer
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：
LongBuffer 1: [8, 0, 9, 0, 0, 0, 0, 0, 0, 0]
LongBuffer 2: [8, 0, 9, 7, 4, 0, 0, 0, 0, 0]
Both are not equal