Rewrite the following code by removing Integer.parseInt

Please help with the following question:

Rewrite the following code by removing Integer.parseInt

public class javaapplication1 {

/**
* @param args
*
*/
public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

//create 3 Department instances
System.out.println("Enter Department 1 name and ID: ");
Department d1=new Department(sc.nextLine(), Integer.parseInt ( sc.nextLine()));
System.out.println("Enter Department 2 name and ID: ");
Department d2=new Department(sc.nextLine(), Integer.parseInt( sc.nextLine()));
System.out.println("Enter Department 3 name and ID: ");
Department d3=new Department(sc.nextLine(), Integer.parseInt( sc.nextLine()));

//create 5 Students
System.out.println("Enter Student 1 Id, Name and Dept ID");
Student s1=new Student(Integer.parseInt(sc.nextLine()),sc.nextLine(),Integer.parseInt(sc.nextLine()));
System.out.println("Enter Student 2 Id, Name and Dept ID");
Student s2=new Student(Integer.parseInt(sc.nextLine()),sc.nextLine(),Integer.parseInt(sc.nextLine()));
System.out.println("Enter Student 3 Id, Name and Dept ID");
Student s3=new Student(Integer.parseInt(sc.nextLine()),sc.nextLine(),Integer.parseInt(sc.nextLine()));
System.out.println("Enter Student 4 Id, Name and Dept ID");
Student s4=new Student(Integer.parseInt(sc.nextLine()),sc.nextLine(),Integer.parseInt(sc.nextLine()));
System.out.println("Enter Student 5 Id, Name and Dept ID");
Student s5=new Student(Integer.parseInt(sc.nextLine()),sc.nextLine(),Integer.parseInt(sc.nextLine()));

//create University instance
University u1 = new University("Oxford",40000,2500000);

System.out.println("Student number 1 in Department 1: "+equals(s1.getDepId(),d1.getDepId()));

System.out.print("Input a String: ");
String str1=sc.nextLine(); //input string from user
String temp="";

for(int i=0;i<str1.length();i++){ //from 0 to last index

if(i%2==0) //if even position
temp+=Character.toLowerCase(str1.charAt(i)); //conavrt to lower case and add to temp

else //if odd position
temp+=Character.toUpperCase(str1.charAt(i)); //convert to upper case and add to temp
}
System.out.println(temp);
}

public static boolean equals(int n1,int n2){
return n1==n2; //return true if both are same else return false
}
}

public class University{
    
    //declare the instance variables as private
    private String name;
    private int population;
    private double budget;
    
    //constructor for setting values
    public University(String name, int population, double budget){
        setName(name);
        setPopulation(population);
        setBudget(budget);
    }
    
    //setters
    public void setName(String n){
        name=n;
    }
    
    public void setPopulation(int p){
        population=p;
    }
    
    public void setBudget(double b){
        budget=b;
    }
    
    //getters
    public String getName(){
        return name;
    }
    
    public int getPopulation(){
        return population;
    }
    
    public double getBudget(){
        return budget;
    }
}

public class Department{
    
    //declaring instance variables
    private String Dep_Name;
    private int Dep_Id;
    
    //constructor for setting instance variables
    public Department(String name, int id){
        Dep_Name=name;
        Dep_Id=id;
    }
    
    //setters
    public void setDepName(String name){
        Dep_Name=name;
    }
    
    public void setDepId(int id){
        Dep_Id=id;
    }
    
    //getters
    public String getDepName(){
        return Dep_Name;
    }
    
    public int getDepId(){
        return Dep_Id;
    }
}