How do I also pass the arraylist 'end' as a parameter inside the begin method along with the 'start' arraylist?
List<String> start = new ArrayList<String>();
List<String> end = new ArrayList<String>();
public static void begin(List<String> start)
{
}
Just simply add it to the parameter list of the method:
List<String> start = new ArrayList<String>();
List<String> end = new ArrayList<String>();
public static void begin(List<String> start, List<String> end) {
}
and call the method like this:
begin(start, end);
Just add it as a second parameter.
List<String> startList = new ArrayList<String>();
List<String> endList = new ArrayList<String>();
begin(startList, endList); // the actual call
...
public static void begin(List<String> start, List<String> start)
{
}
While multiple parameters is definitely the recommended way to do it, there are a few alternative non-recommended ways to achieve this as well. Enjoy!
import java.util.List;
public class ParameterListTest {
public static void main(String[] args) {
List<String> startList = List.of("Value1", "Value2");
List<String> endList = List.of("Value3", "Value4");
//Recommended way
version1(startList, endList);
//Goofy alternatives
version2(startList, endList);
List<String>[] listArray = new List[]{startList, endList};
version3(listArray);
List<List<String>> nestedList = List.of(startList, endList);
version4(nestedList);
}
public static void version1(List<String> start, List<String> end) {
System.out.println("Version 1");
System.out.println(start);
System.out.println(end);
System.out.println();
}
public static void version2(List<String>...lists) {
System.out.println("Version 2");
System.out.println(lists[0]);
System.out.println(lists[1]);
System.out.println();
}
public static void version3(List<String>[] lists) {
System.out.println("Version 3");
System.out.println(lists[0]);
System.out.println(lists[1]);
System.out.println();
}
public static void version4(List<List<String>> nest) {
System.out.println("Version 4");
System.out.println(nest.get(0));
System.out.println(nest.get(1));
System.out.println();
}
}
List<String> end. For more information on how to define methods, I recommend reading a tutorial on the topic, e.g. this one by Oracle.