boolean removeFirstOccurrence(Object o)
描述 (Description)
java.util.ArrayDeque.removeFirstOccurrence(Object)方法删除此deque中第一次出现的指定element 。
声明 (Declaration)
以下是java.util.ArrayDeque.removeFirstOccurrence(o)方法的声明
public boolean removeFirstOccurrence(Object o)
参数 (Parameters)
o - 首次出现的元素,如果存在,则从该双端队列中删除。
返回值 (Return Value)
如果deque包含指定的元素,则此方法返回true 。
异常 (Exception)
NA
例子 (Example)
以下示例显示了java.util.ArrayDeque.removeFirstOccurrence(o)方法的用法。
package com.iowiki;
import java.util.ArrayDeque;
import java.util.Deque;
public class ArrayDequeDemo {
public static void main(String[] args) {
// create an empty array deque with an initial capacity
Deque<Integer> deque = new ArrayDeque<Integer>(8);
// use add() method to add elements in the deque
deque.add(15);
deque.add(20);
deque.add(25);
deque.add(20);
// let us print all the elements available in deque
for (Integer number : deque) {
System.out.println("Number = " + number);
}
// this will remove first occurrence of element 20
deque.removeFirstOccurrence(20);
System.out.println("Remaining Elements: ");
// let us print all the elements available in deque
for (Integer number : deque) {
System.out.println("Number = " + number);
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
Number = 15
Number = 20
Number = 25
Number = 20
Remaining Elements:
Number = 15
Number = 25
Number = 20