JAVA leer ArrayList de varios tipos: https://es.stackoverflow.com/q/106423/29967, Java

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import java.util.*;
import java.lang.*;

class Rextester
{  
    public static void main(String args[])
    {
    
        ArrayList<Integer> arrListInt = new ArrayList<Integer>(3);
        ArrayList<String> arrListString = new ArrayList<String>(3);
        ArrayList<People> arrListPeople = new ArrayList<People>(3);

arrListInt.add(15);
        arrListInt.add(22);
        arrListInt.add(33);

arrListString.add("Uno");
        arrListString.add("Dos");
        arrListString.add("Tres");
        
        arrListPeople.add(new People("Pedro",28));
        arrListPeople.add(new People("Santiago",30));
        arrListPeople.add(new People("Juan",22));

System.out.println("Primer elemento de arrListInt: " + arrListInt.get(0));	  
        System.out.println("Segundo elemento de arrListString: = " + arrListString.get(1));

System.out.println("Tercera Persona de arrListPeople: = " + arrListPeople.get(2).toString());	  
        System.out.println("Segunda Persona (Nombre) de arrListPeople: = " + arrListPeople.get(1).getName());

}
      
    
}

class People 
{
    String name;
    int age;

People (String name,int age) 
    {
        this.name=name;
        this.age=age;
    }

String getName() 
    {
        return name;
    }

int getAge() 
    {
        return age;
    }

@Override
    public String toString() 
    {
        return "Nombre: "+getName()+" - Edad:"+getAge();
      }

}

[ + ] Show input
Compilation time: 0.63 sec, absolute running time: 0.13 sec, cpu time: 0.09 sec, memory peak: 18 Mb, absolute service time: 0,76 sec

JAVA leer ArrayList de varios tipos: https://es.stackoverflow.com/q/10...