Una LinkedList es una estructura de datos lineal, en la que los elementos no se almacenan en ubicaciones de memoria contiguas.
Para convertir una lista vinculada en una string, debemos recorrer la lista vinculada y, después de eso, debemos agregar el elemento de la lista vinculada a la variable de string.
Podemos usar la clase String, StringBuilder o StringBuffer para convertir una LinkedList en una string.
Para agregar una string, podemos usar el operador «+» para la clase String y el método de agregar para StringBuffer y StringBuilder.
Ejemplo 1:
Java
// Java program to Convert LinkedList to String in Java
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;
class GFG {
public static void main(String[] args)
{
// creating a linkedlist
LinkedList<Integer> list = new LinkedList<>();
// adding elements to linkedlist
list.add(100);
list.add(200);
list.add(300);
list.add(400);
// By using String Class
String s = "";
// using iterator for traversing a linkedlist
Iterator<Integer> iterator = list.iterator();
while (iterator.hasNext()) {
// appending using "+" operator
s = s + iterator.next() + " ";
}
// Displaying output
System.out.println(s);
// By using String Buffer
StringBuffer stringBuffer = new StringBuffer();
// using enhanced for loop for traversing a
// linkedlist
for (Integer integer : list) {
// using append method for appending string
stringBuffer.append(integer).append(" ");
}
// displaying output
System.out.println(stringBuffer);
// By using String Builder
StringBuilder stringBuilder = new StringBuilder();
// using ListIterator for traversing a linked list
ListIterator<Integer> listIterator
= list.listIterator();
while (listIterator.hasNext()) {
// using append method for appending string
stringBuilder.append(listIterator.next())
.append(" ");
}
// displaying output
System.out.println(stringBuilder);
}
}
Producción
100 200 300 400 100 200 300 400 100 200 300 400
Ejemplo 2: En este ejemplo, usaremos una clase definida por el usuario
Java
// Java program to Convert LinkedList to String in Java
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;
class friendsDetail {
// class field
private String name;
private String nickName;
private int id;
// parameterised constructor
public friendsDetail(String name, String nickName,
int id)
{
this.name = name;
this.nickName = nickName;
this.id = id;
}
// getter for name
public String getName() { return name; }
// setter for name
public void setName(String name) { this.name = name; }
// getter for marks
public int getID() { return id; }
// setter for marks
public void setID(int id) { this.id = id; }
// getter for nickname
public String getNickName() { return nickName; }
// setter for nickname
public void setNickName(String nickName)
{
this.nickName = nickName;
}
//@Override toString method
public String toString()
{
return "name='" + name + '\'' + ", nickName='"
+ nickName + '\'' + ", ID=" + id;
}
}
class Main {
public static void main(String[] args)
{
LinkedList<friendsDetail> list = new LinkedList<>();
// adding elements to linked list
list.add(
new friendsDetail("Ridhi", "Goda", 202199));
list.add(
new friendsDetail("Ananya", "Natki", 202195));
list.add(new friendsDetail("Ankit", "Chota Don",
202192));
list.add(
new friendsDetail("Suraj", "Bhindi", 202147));
list.add(
new friendsDetail("Sarthak", "Nagin", 202178));
list.add(new friendsDetail("Sonika", "Chipkali",
202167));
list.add(new friendsDetail("Shishya", "Gorilla",
202157));
System.out.println("Using String Class\n");
// using string class
String s = "";
// using iterator for traversing a linked list
Iterator<friendsDetail> itr = list.iterator();
while (itr.hasNext()) {
// appending string using "+" operator
s = s + itr.next() + "\n";
}
// Displaying output
System.out.println(s);
System.out.println("\nUsing String Buffer\n");
// using string buffer
StringBuffer stringBuffer = new StringBuffer();
// using enhanced for loop for linked list traversal
for (friendsDetail friendmarks : list) {
// using append method for appending
stringBuffer.append(friendmarks).append("\n");
}
// displaying output
System.out.println(stringBuffer);
// using string builder
System.out.println("\nUsing String Builder\n");
// using list iterator for traversing a linked list
ListIterator<friendsDetail> itr2
= list.listIterator();
StringBuilder stringBuilder = new StringBuilder();
while (itr2.hasNext()) {
// using append method for appending
stringBuilder.append(itr2.next()).append("\n");
}
// displaying output
System.out.println(stringBuilder);
}
}
Producción
Using String Class name='Ridhi', nickName='Goda', ID=202199 name='Ananya', nickName='Natki', ID=202195 name='Ankit', nickName='Chota Don', ID=202192 name='Suraj', nickName='Bhindi', ID=202147 name='Sarthak', nickName='Nagin', ID=202178 name='Sonika', nickName='Chipkali', ID=202167 name='Shishya', nickName='Gorilla', ID=202157 Using String Buffer name='Ridhi', nickName='Goda', ID=202199 name='Ananya', nickName='Natki', ID=202195 name='Ankit', nickName='Chota Don', ID=202192 name='Suraj', nickName='Bhindi', ID=202147 name='Sarthak', nickName='Nagin', ID=202178 name='Sonika', nickName='Chipkali', ID=202167 name='Shishya', nickName='Gorilla', ID=202157 Using String Builder name='Ridhi', nickName='Goda', ID=202199 name='Ananya', nickName='Natki', ID=202195 name='Ankit', nickName='Chota Don', ID=202192 name='Suraj', nickName='Bhindi', ID=202147 name='Sarthak', nickName='Nagin', ID=202178 name='Sonika', nickName='Chipkali', ID=202167 name='Shishya', nickName='Gorilla', ID=202157