Exception in thread main java.lang.UnsupportedOperationException
If you see below exception means you are trying to modify fixed size array.
Exception in thread "main" java.lang.UnsupportedOperationException at java.util.AbstractList.remove(Unknown Source) at java.util.AbstractList$Itr.remove(Unknown Source) at com.javahonk.unsupportedexception.UnsupportedException.main(UnsupportedException.java:23)
Below example will throw java.lang.UnsupportedOperationException:
package com.javahonk.unsupportedexception; import java.util.Arrays; import java.util.Iterator; import java.util.List; public class UnsupportedExceptionDemo { public static void main(String[] args) { String[] valStrings = { "Java", "Unsupported", "Test" }; List<String> list = Arrays.asList(valStrings); for (Iterator<String> iterator = list.iterator(); iterator.hasNext();) { String string = iterator.next(); iterator.remove(); } } }
To fix it use LinkedList constructor and pass collection object as parameter shown below:
package com.javahonk.unsupportedexception; import java.util.Arrays; import java.util.Iterator; import java.util.LinkedList; import java.util.List; public class UnsupportedException { public static void main(String[] args) { String[] strings = { "Java", "Unsupported", "Test" }; List<String> list2 = new LinkedList<String> (Arrays.asList(strings)); for (Iterator<String> iterator = list2.iterator(); iterator.hasNext();) { String string = iterator.next(); iterator.remove(); } System.out.println("Removed all data from list"); } }
