Java 中的字节缓冲等于()方法，示例
原文:https://www . geeksforgeeks . org/bytebuffer-equals-method-in-Java-with-examples/
java.nio.ByteBuffer 类的 equals() 方法用于检查给定的缓冲区是否等于另一个对象。
当且仅当两个字节缓冲区相等时，
- 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
- 剩余元素的两个序列，不管它们的起始位置如何，都是逐点相等的。
字节缓冲区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(该缓冲区要与之比较的对象)为参数。
返回值:当且仅当该缓冲区等于给定对象时，该方法返回真。
以下是说明等于()方法的示例:
实施例 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 ByteBuffer 1
int capacity1 = 5;
// Declaring the capacity of the ByteBuffer 2
int capacity2 = 5;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer 1
// and allocating size capacity
ByteBuffer bb1 = ByteBuffer.allocate(capacity1);
// creating object of ByteBuffer 2
// and allocating size capacity
ByteBuffer bb2 = ByteBuffer.allocate(capacity2);
// putting the int to byte typecast value in ByteBuffer 1
bb1.put((byte)20);
bb1.put((byte)30);
bb1.put((byte)40);
bb1.rewind();
// putting the value in ByteBuffer 2
bb2.put((byte)20);
bb2.put((byte)30);
bb2.put((byte)40);
bb2.rewind();
// print the ByteBuffer 1
System.out.println(" ByteBuffer 1: "
+ Arrays.toString(bb1.array()));
// print the ByteBuffer 2
System.out.println(" ByteBuffer 2: "
+ Arrays.toString(bb2.array()));
// checking the equality of both ByteBuffer
boolean b = bb1.equals(bb2);
// checking if else condition
if (b)
System.out.println(" both are equal");
else
System.out.println(" both are not equal");
}
catch (IllegalArgumentException e) {
System.out.println("Exception thrown : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Output:
ByteBuffer 1: [20, 30, 40, 0, 0]
ByteBuffer 2: [20, 30, 40, 0, 0]
both are equal
实施例 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 ByteBuffer 1
int capacity1 = 5;
// Declaring the capacity of the ByteBuffer 2
int capacity2 = 3;
// Creating the ByteBuffer
try {
// creating object of ByteBuffer 1
// and allocating size capacity
ByteBuffer bb1 = ByteBuffer.allocate(capacity1);
// creating object of ByteBuffer 2
// and allocating size capacity
ByteBuffer bb2 = ByteBuffer.allocate(capacity2);
// putting the int to byte typecast value in ByteBuffer 1
bb1.put((byte)20);
bb1.put((byte)30);
bb1.put((byte)40);
bb1.rewind();
// putting the value in ByteBuffer 2
bb2.put((byte)20);
bb2.put((byte)30);
bb2.put((byte)40);
bb2.rewind();
// print the ByteBuffer 1
System.out.println(" ByteBuffer 1: "
+ Arrays.toString(bb1.array()));
// print the ByteBuffer 2
System.out.println(" ByteBuffer 2: "
+ Arrays.toString(bb2.array()));
// checking the equality of both ByteBuffer
boolean b = bb1.equals(bb2);
// checking if else condition
if (b)
System.out.println(" both are equal");
else
System.out.println(" both are not equal");
}
catch (IllegalArgumentException e) {
System.out.println("Exception thrown : " + e);
}
catch (ReadOnlyBufferException e) {
System.out.println("Exception thrown : " + e);
}
}
}
Output:
ByteBuffer 1: [20, 30, 40, 0, 0]
ByteBuffer 2: [20, 30, 40]
both are not equal
版权属于：月萌API www.moonapi.com，转载请注明出处
