Java Arraylist got java.lang.IndexOutOfBoundsException?
arraylist, exception, java, outbound
Solution
The following lines:
for (int i = 0; i <= meString.size(); i++) {
System.out.println(meString.get(i));
}
should be:
for (int i = 0; i < meString.size(); i++) {
System.out.println(meString.get(i));
}
This is because the index of the list starts from zero.
`Index: 4, Size: 4` explains a little more. When you call `get(4)`, an exception occurs because your list only has a size of 4. `get(4)` would attempt to access the 5th element in the list.
Valid elements you can access would be `get(0)`, `get(1)`, `get(2)`, `get(3)`.
Problem
I'm a general 3D artist, switched from my career and started to learn programming. I've got a problem with c106a handout #5. The code works, but I've still got some error log here. ``` Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 4, Size: 4 at java.util.ArrayList.RangeCheck(ArrayList.java:547) at java.util.ArrayList.get(ArrayList.java:322) at UniqueNames.showUnique(UniqueNames.java:23) at UniqueNames.main(UniqueNames.java:39) ``` Why does `Arraylist`, which can stretch its capacity on its own, still get an `OutOfBoundsException`? Here's my full code: ``` import acm.io.*; import acm.program.ConsoleProgram; import acm.util.*; import java.io.*; import java.util.ArrayList; import java.lang.*; public class UniqueNames extends ConsoleProgram{ static ArrayList<String> meString = new ArrayList<String>(); static String input ; public static void storeUnique(String input){ if (!meString.contains(input)) { meString.add(input); } } public static void showUnique(ArrayList<String> meString){ System.out.println("Unique name list contains:"); for(int i=0 ;i<= meString.size() ;i++){ System.out.println(meString.get(i)); } } public static void main(String[] args){ try{ InputStreamReader stream = new InputStreamReader(System.in); BufferedReader br = new BufferedReader(stream); while (true){ System.out.println("Enter name:"); String input = br.readLine(); if (input.equals("")) break; storeUnique(input); } {showUnique(meString);} } catch(IOException e){ } } } ```