Hi all, I am currently trying to pass an arraylist as a parameter for adding and deleting a student from the arraylist.
Well, I have just learned about arraylist. Is it possible to pass an arraylist as parameter.
Your help will be highly appreciated. Thanks.
My codes below:
package student;
import java.io.*;
import java.util.*;
public class StudentProtocol {
private String id;
private String name;
private String module_name;
private String marks;
BufferedReader userInput=new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> myArr =new ArrayList<String>();
//constructor
public StudentProtocol(String id,String name,String module_name,String marks){
this.id=id;
this.name=name;
this.module_name=module_name;
this.marks=marks;
}
//
public String getId(){
return id;
}
public String getName(){
return name;
}
public String getModuleName(){
return module_name;
}
public String getMarks(){
return marks;
}
//mutator
public void setId(String id){
this.id=id;
}
public void setName(String name){
this.name=name;
}
public void setModuleName(String module_name){
this.module_name=module_name;
}
public void setMarks(String marks){
this.marks=marks;
}
public void displayStudentDetails(){
System.out.println("ID is "+id);
System.out.println("Name is "+name);
System.out.println("Module name is "+module_name);
System.out.println("Marks is "+marks);
}
public void addDetails()throws IOException{
BufferedReader userInput=new BufferedReader(new InputStreamReader(System.in));
ArrayList<String> myArr =new ArrayList<String>();
myArr.add(id);
myArr.add(name);
myArr.add(module_name);
myArr.add(marks);
System.out.println("Adding a new student");
System.out.println("Enter id:");
String id = userInput.readLine();
System.out.println("Enter name:");
String name = userInput.readLine();
System.out.println("Enter module name:");
String module_name = userInput.readLine();
System.out.println("Enter marks:");
String marks = userInput.readLine();
System.out.println("ID is "+id);
System.out.println("Name is "+name);
System.out.println("Module name is "+module_name);
System.out.println("Marks is "+marks);
}
public void removeDetails(ArrayList<String> myArr) throws IOException{
displayStudentDetails();
//BufferedReader userInput = new BufferedReader (new InputStreamReader (System.in));
System.out.println("Please,enter a student id to delete:");
String id =userInput.readLine();
System.out.println("Size of array before removing item:"+myArr.size());
myArr.remove(myArr);
System.out.println(id+"has been removed!");
System.out.println("Size of array after removing item:"+myArr.size());
}
/*public void modifyDetails() throws IOException{
ArrayList<String> a= myArr;
System.out.println(myArr);
}*/
public static void main(String[] args, ArrayList<String> id) throws IOException {
StudentProtocol s1= new StudentProtocol("89023","Rita","cse 3000Y","32.5");
s1.addDetails();
}
}