循环链表与链表相比略有不同。在循环链表中，最后一个节点指向第一个节点，这样就完成了一个完整的节点循环。也就是说，我们也可以说，在这个链表中，最后一个元素不为null。在这种类型的链表中，任何节点都可以作为起点。这意味着即使我们从任何节点开始，也可以遍历完整的列表。由于最后一个节点指向第一个节点，因此在循环链表中执行入队和出队操作非常容易。在本文中，我们将通过示例来了解循环链表。在本主题中，我们将学习 Java 中的循环链表。
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Java 循环链表语法：
语法如下：
public class Course{
float marksscored;
Course comingup;
public Course(float marksscored) {
this.marksscored = marksscored;
}
}public Course evaluated = null; public Course notevaluated = null;
public void continued(float marksscored){
Course newCourse = new Course(marksscored);
if(evaluated == null) {
evaluated = newCourse;
notevaluated = newCourse;
newCourse.comingup = evaluated;
}
else {
notevaluated.comingup = newCourse;
notevaluated = newCourse;
notevaluated.comingup = evaluated;
}
}public void show() {
Course current = evaluated;
if(evaluated == null) {
System.out.println("Results are underevaluation");
}
else {
System.out.println("The Marks Scored are as follows: ");
do{
System.out.print(" \n"+ current.marksscored);
current = current.comingup;
}while(current != evaluated);
System.out.println();
}
}
public static void main(String[] args) {
EDUCBA marks = new EDUCBA();
marks.continued(100);
marks.continued(230);
marks.continued(349);
marks.continued(423);
marks.show();
}
}正如我们之前所读到的，循环链表只不过是一个包含节点集合的列表，其中最后一个节点指向第一个节点。下图解释了这一点。这里节点1是头节点，节点4是最后一个节点。所以，在这里我们可以看到节点 1 指向节点 2，然后节点 2 指向节点 3，节点 3 指向节点 4，最后节点 4 又指向节点 1。
下面是java中循环链表的例子：
在下面的示例中，显示了一个基于字符串的循环列表。首先，我们定义了一个节点类Course。然后我们定义了另一个类来创建循环链表，并且这个类被添加并显示在循环链表中。
public class EDUCBA {
public class Course{
float marksscored;
Course comingup;
public Course(float marksscored) {
this.marksscored = marksscored;
}
}
public void continued(float marksscored){
Course newCourse = new Course(marksscored);
if(evaluated == null) {
evaluated = newCourse;
notevaluated = newCourse;
newCourse.comingup = evaluated;
}
else {
notevaluated.comingup = newCourse;
notevaluated = newCourse;
notevaluated.comingup = evaluated;
}
}
public Course evaluated = null;
public Course notevaluated = null;
public void show() {
Course current = evaluated;
if(evaluated == null) {
System.out.println("Results are underevaluation");
}
else {
System.out.println("The Marks Scored are as follows: ");
do{
System.out.print(" \n"+ current.marksscored);
current = current.comingup;
}while(current != evaluated);
System.out.println();
}
}
public static void main(String[] args) {
EDUCBA marks = new EDUCBA();
marks.continued(100);
marks.continued(230);
marks.continued(349);
marks.continued(423);
marks.show();
}
}输出：
在下面的示例中，显示了一个基于字符串的循环列表。首先，我们定义了一个节点类Coursename。然后我们定义了另一个类来创建循环链表，并且这个类被添加并显示在循环链表中。
public class EDUCBA {
public class Coursename{
String name;
Coursename comingup;
public Coursename(String name) {
this.name = name;
}
}
public void continued(String name){
Coursename newCoursename = new Coursename(name);
if(evaluated == null) {
evaluated = newCoursename;
notevaluated = newCoursename;
newCoursename.comingup = evaluated;
}
else {
notevaluated.comingup = newCoursename;
notevaluated = newCoursename;
notevaluated.comingup = evaluated;
}
}
public Coursename evaluated = null;
public Coursename notevaluated = null;
public void show() {
Coursename current = evaluated;
if(evaluated == null) {
System.out.println("No desired course found");
}
else {
System.out.println("The requested courses are as follow: ");
do{
System.out.print(" \n"+ current.name);
current = current.comingup;
}while(current != evaluated);
System.out.println();
}
}
public static void main(String[] args) {
EDUCBA names = new EDUCBA();
names.continued("Course 1: Data Science");
names.continued("Course 2: Finance");
names.continued("Course 3: React Native");
names.continued("Course 4: React");
names.continued("Course 5: Excel");
names.continued("Course 6: Java");
names.continued("Course 7: Lua");
names.continued("Course 8: TypeScript");
names.continued("For more Information");
names.continued("Feel free to visit us on www.EDUCBA.com");
names.show();
}
}输出：
在本文的基础上，我们了解了Java中循环链表的概念以及它与链表的区别。我们了解了循环链表的工作原理以及演示的示例。这些例子可以帮助初学者很容易地理解循环链表的概念。
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