Java中的 ConcurrentLinkedDeque equals() 方法及示例
Java.util.ConcurrentLinkedDeque类的equals()方法用于比较指定对象与此 ConcurrentLinkedDeque 是否相等。当且仅当指定对象也是 ConcurrentLinkedDeque,两个 ConcurrentLinkedDeque 具有相同大小,并且两个 ConcurrentLinkedDeque 中所有对应的元素对相等时,才返回 true。 (如果 (e1==null ? e2==null : e1.equals(e2)) 两个元素 e1 和 e2 相等。)换句话说,如果两个 ConcurrentLinkedDeques 包含相同顺序的相同元素,则它们被定义为相等.
句法:
public boolean equals(Object o)
参数:此方法将对象 o作为参数,以便与此 ConcurrentLinkedDeque 进行比较是否相等。
返回值:如果指定对象等于此 ConcurrentLinkedDeque,则此方法返回true 。
下面的程序说明了 ConcurrentLinkedDeque.equals() 方法:
方案一:
// Java Program Demonstrate equals()
// method of ConcurrentLinkedDeque
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of ConcurrentLinkedDeque
ConcurrentLinkedDeque CLD1
= new ConcurrentLinkedDeque();
// Add numbers to end of ConcurrentLinkedDeque
CLD1.add(7855642);
CLD1.add(35658786);
CLD1.add(5278367);
CLD1.add(74381793);
System.out.println("Linked Blocking Deque 1: " + CLD1);
// create another object of ConcurrentLinkedDeque
ConcurrentLinkedDeque CLD2
= new ConcurrentLinkedDeque();
// Add numbers to end of ConcurrentLinkedDeque
CLD2.add("1");
CLD2.add("2");
CLD2.add("3");
CLD2.add("4");
System.out.println("Linked Blocking Deque 2: " + CLD2);
// using equals() function
System.out.println("Are both Linked Blocking Deque equal: "
+ CLD1.equals(CLD2));
}
}
输出:
Linked Blocking Deque 1: [7855642, 35658786, 5278367, 74381793]
Linked Blocking Deque 2: [1, 2, 3, 4]
Are both Linked Blocking Deque equal: false
方案二:
// Java Program Demonstrate equals()
// method of ConcurrentLinkedDeque
// when the list contains characters
import java.util.concurrent.ConcurrentLinkedDeque;
import java.util.*;
public class GFG {
public static void main(String[] args)
throws IllegalStateException
{
// create object of ConcurrentLinkedDeque
ConcurrentLinkedDeque CLD1
= new ConcurrentLinkedDeque();
// Add numbers to end of ConcurrentLinkedDeque
CLD1.add("1");
CLD1.add("2");
CLD1.add("3");
CLD1.add("4");
System.out.println("Linked Blocking Deque 1: " + CLD1);
// using equals() function
System.out.println("Is CLD1 equal to CLD1: "
+ CLD1.equals(CLD1));
}
}
输出:
Linked Blocking Deque 1: [1, 2, 3, 4]
Is CLD1 equal to CLD1: true