Write a java source code of a program with following features:
1) A class StudentNames that manages a String array of names of the 20 students. Include following methods: a. void addName(String name) : add names to the array b. void deleteName(String name) : delete names from the array based on name c. void deleteName(int id) : delete names from the array based on index d. boolean search(String name) : search a name e. void addName(String name, int index): add name to an index
2) Two user defined exceptions IndexNotAvailableException and IndexOutOfRangeException as subclasses of the java Exception class. Throw an IndexNotAvailableException if a name exists in the location. Throw an IndexOutOfRangeException if an index is out of range (index < 0 || index > 20)
public class StudentsName {
String [] names ;
int index;
public StudentsName() {
names = new String[20];
index = 0;
}
void addName(String name) throws IndexOutOfBoundsException{
if(index >= 20){
throw new IndexOutOfBoundsException();
}else{
names[index] = name;
index ++;
}
}
void deleteByName(String name){
for(int i=0;i<20;i++){
if(names[i].equals(name)){
names[i]="";
break;
}
}
}
void deleteByIndex(int id)throws IndexOutOfRange{
if(id <0 || id >=20){
throw new IndexOutOfRange();
}else{
names[id]="";
}
}
boolean search(String name){
for(int i=0;i<20;i++){
if(names[i].equals(name)){
return true;
}
}
return false;
}
void addname(String name , int index) throws IndexOutOfRange, IndexNotAvailable{
if(index < 0 || index >= 0){
throw new IndexOutOfRange();
}else if(!names[index].isEmpty()){
throw new IndexNotAvailable();
}else{
}
}
}
class IndexNotAvailable extends Exception{
public IndexNotAvailable() {
System.out.println("Entered index is not available !!");
}
}
class IndexOutOfRange extends Exception{
public IndexOutOfRange() {
System.out.println("Entered index is not in range !!");
}
}
