Hi Friend,

Try the following code:

import java.util.*;

class  TataMotors{
    String category;
    String model;
    TataMotors(String category,String model){
    this.category=category;
    this.model=model;
    }
    public String getCategory(){
        return category;
    }
    public String getModel(){
        return model;
    }
    public static void ModelOfCategory(ArrayList<TataMotors> list){
        Scanner input=new Scanner(System.in);
        System.out.print("Enter Category: ");
        String category=input.nextLine();
        System.out.println();
        System.out.print("Model is: ");
        for (TataMotors tm : list){
            if(tm.getCategory().equals(category)){
                System.out.print(tm.getModel());
            }
        }
    }

    public static void main(String[] args) 
    {
        ArrayList<TataMotors> list=new ArrayList<TataMotors>();
        list.add(new TataMotors("SUV","TATA SAFARI"));
        list.add(new TataMotors("SEDAN","TATA INDIGO"));
        list.add(new TataMotors("ECONOMY","TATA INDICA"));
        list.add(new TataMotors("MINI","TATA NANO"));

        ModelOfCategory(list);
    }
}

Thanks