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Add example for get an index of element from linkedlist blog

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collections/linkedlist/get-an-index-of-element-of-linkedlist
- LinkedListIndexOf.java
- LinkedListLastIndexOf.java

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	`1`	`+package com.gaurav.ExProject.LinkedList;`
	`2`	`+`
	`3`	`+import java.util.LinkedList;`
	`4`	`+`
	`5`	`+/**`
	`6`	`+ * A Java program to get the first index of the element from`
	`7`	`+ * the linkedlist using indexOf(Object o) method.`
	`8`	`+ *`
	`9`	`+ * @author coderolls.com`
	`10`	`+ */`
	`11`	`+public class LinkedListIndexOf {`
	`12`	`+`
	`13`	`+ public static void main(String[] args) {`
	`14`	`+`
	`15`	`+ LinkedList<String> linkedList = new LinkedList<String>();`
	`16`	`+ linkedList.add("PepsiCo");`
	`17`	`+ linkedList.add("DrPepper");`
	`18`	`+ linkedList.add("GoldSpot");`
	`19`	`+ linkedList.add("GoldSpot");`
	`20`	`+ linkedList.add("CocaCola");`
	`21`	`+ linkedList.add("Moxie");`
	`22`	`+ linkedList.add("GoldSpot");`
	`23`	`+ linkedList.add("Moxie");`
	`24`	`+`
	`25`	`+ System.out.println("LinkedList: ");`
	`26`	`+ System.out.println(linkedList);`
	`27`	`+`
	`28`	`+ // get first index of GoldSpot`
	`29`	`+ int index = linkedList.indexOf("GoldSpot"); // 2`
	`30`	`+`
	`31`	`+ System.out.println("\nIndex of the GoldSpot in linkedList is: "+ index);`
	`32`	`+`
	`33`	`+ // get first index of Moxie`
	`34`	`+ int indexMoxie = linkedList.indexOf("Moxie"); // 5`
	`35`	`+`
	`36`	`+ System.out.println("\nIndex of the Moxie in linkedList is: "+ indexMoxie);`
	`37`	`+ }`
	`38`	`+}`

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	`1`	`+package com.gaurav.ExProject.LinkedList;`
	`2`	`+`
	`3`	`+import java.util.LinkedList;`
	`4`	`+`
	`5`	`+/**`
	`6`	`+ * A Java program to get the last index of the element from`
	`7`	`+ * the linkedlist using lastIndexOf(Object o) method.`
	`8`	`+ *`
	`9`	`+ * @author coderolls.com`
	`10`	`+ */`
	`11`	`+public class LinkedListLastIndexOf {`
	`12`	`+`
	`13`	`+ public static void main(String[] args) {`
	`14`	`+`
	`15`	`+ LinkedList<String> linkedList = new LinkedList<String>();`
	`16`	`+ linkedList.add("PepsiCo");`
	`17`	`+ linkedList.add("DrPepper");`
	`18`	`+ linkedList.add("GoldSpot");`
	`19`	`+ linkedList.add("GoldSpot");`
	`20`	`+ linkedList.add("CocaCola");`
	`21`	`+ linkedList.add("Moxie");`
	`22`	`+ linkedList.add("GoldSpot");`
	`23`	`+ linkedList.add("Moxie");`
	`24`	`+`
	`25`	`+ System.out.println("LinkedList: ");`
	`26`	`+ System.out.println(linkedList);`
	`27`	`+`
	`28`	`+ // get first index of GoldSpot`
	`29`	`+ int index = linkedList.lastIndexOf("GoldSpot"); // 6`
	`30`	`+`
	`31`	`+ System.out.println("\nIndex of the GoldSpot in linkedList is: "+ index);`
	`32`	`+`
	`33`	`+ // get first index of Moxie`
	`34`	`+ int indexMoxie = linkedList.lastIndexOf("Moxie"); // 7`
	`35`	`+`
	`36`	`+ System.out.println("\nIndex of the Moxie in linkedList is: "+ indexMoxie);`
	`37`	`+ }`
	`38`	`+}`

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