![import java.util.ArrayList;
import java.util.List;
public class SearchList {
/**
* param args
*/
public static void main(String[] args) {
List list = new ArrayList();
list.add(3);
list.add(3);
list.add(1);
System.out.println("Search element 3 in list [3,3,1] :"
+ search(list, 3));
System.out.println("Search element 5 in list [3,3,1] :"
+ search(list, 5));
}
/**
* method to find the index of element in the list
* param list
* param element
* return
*/
public static int search(List list, Object element) {
int index = -1;
if (list == null || element == null)
throw new NullPointerException();
else {
int searchElement = (int) element;
for (int i = 0; i < list.size(); i++) {
int number = (int) list.get(i);
if (number == searchElement) {
index = i;
}
}
}](https://image.slidesharecdn.com/importjava-230413054407-c2482518/85/import-java-util-ArrayList-import-java-util-List-public-class-S-pdf-1-320.jpg)
![return index;
}
}
OUTPUT:
Search element 3 in list [3,3,1] :1
Search element 5 in list [3,3,1] :-1
Solution
import java.util.ArrayList;
import java.util.List;
public class SearchList {
/**
* param args
*/
public static void main(String[] args) {
List list = new ArrayList();
list.add(3);
list.add(3);
list.add(1);
System.out.println("Search element 3 in list [3,3,1] :"
+ search(list, 3));
System.out.println("Search element 5 in list [3,3,1] :"
+ search(list, 5));
}
/**
* method to find the index of element in the list
* param list
* param element
* return
*/
public static int search(List list, Object element) {
int index = -1;
if (list == null || element == null)
throw new NullPointerException();
else {](https://image.slidesharecdn.com/importjava-230413054407-c2482518/85/import-java-util-ArrayList-import-java-util-List-public-class-S-pdf-2-320.jpg)
![int searchElement = (int) element;
for (int i = 0; i < list.size(); i++) {
int number = (int) list.get(i);
if (number == searchElement) {
index = i;
}
}
}
return index;
}
}
OUTPUT:
Search element 3 in list [3,3,1] :1
Search element 5 in list [3,3,1] :-1](https://image.slidesharecdn.com/importjava-230413054407-c2482518/85/import-java-util-ArrayList-import-java-util-List-public-class-S-pdf-3-320.jpg)
import java.util.ArrayList; import java.util.List;public class S.pdf
- 1. import java.util.ArrayList; import java.util.List; public class SearchList { /** * param args */ public static void main(String[] args) { List list = new ArrayList(); list.add(3); list.add(3); list.add(1); System.out.println("Search element 3 in list [3,3,1] :" + search(list, 3)); System.out.println("Search element 5 in list [3,3,1] :" + search(list, 5)); } /** * method to find the index of element in the list * param list * param element * return */ public static int search(List list, Object element) { int index = -1; if (list == null || element == null) throw new NullPointerException(); else { int searchElement = (int) element; for (int i = 0; i < list.size(); i++) { int number = (int) list.get(i); if (number == searchElement) { index = i; } } }
- 2. return index; } } OUTPUT: Search element 3 in list [3,3,1] :1 Search element 5 in list [3,3,1] :-1 Solution import java.util.ArrayList; import java.util.List; public class SearchList { /** * param args */ public static void main(String[] args) { List list = new ArrayList(); list.add(3); list.add(3); list.add(1); System.out.println("Search element 3 in list [3,3,1] :" + search(list, 3)); System.out.println("Search element 5 in list [3,3,1] :" + search(list, 5)); } /** * method to find the index of element in the list * param list * param element * return */ public static int search(List list, Object element) { int index = -1; if (list == null || element == null) throw new NullPointerException(); else {
- 3. int searchElement = (int) element; for (int i = 0; i < list.size(); i++) { int number = (int) list.get(i); if (number == searchElement) { index = i; } } } return index; } } OUTPUT: Search element 3 in list [3,3,1] :1 Search element 5 in list [3,3,1] :-1