要从链表中删除第一个或最后一个元素，我们可以使用LinkedList类提供的removeFirst()和removeLast()方法。
package org.nhooo.example.util;
import java.util.LinkedList;
public class LinkedListRemoveItems {
public static void main(String[] args) {
LinkedList<String> grades = new LinkedList<>();
grades.add("A");
grades.add("B");
grades.add("C");
grades.add("D");
grades.add("E");
grades.add("F");
System.out.println("Original values are:");
System.out.println("====================");
for (String grade : grades) {
System.out.println("Grade: " + grade);
}
grades.removeFirst();
grades.removeLast();
System.out.println("New values are:");
System.out.println("====================");
for (String grade : grades) {
System.out.println("Grade: " + grade);
}
}
}该程序打印出以下结果：
Original values are: ==================== Grade: A Grade: B Grade: C Grade: D Grade: E Grade: F New values are: ==================== Grade: B Grade: C Grade: D Grade: E