This video shows the runtime error that results when an index references beyond the end of an array. IT points out that one should always look both at the line number in a runtime error and the index listed in an ArrayIndexOutOfBounds error. This error is fixed by changing the constant index values which are used to index the array.

This video demonstrates a seemingly meaningless runtime error, which occurs when the name of the class is not the same as the name of the file.

Demonstration of a runtime, “Null Pointer exception” ( java.lang.NullPointerException) error and points out how to get the line number from the runtime error. It points out that many null pointer exceptions occur when an object has not been instantiated. This particular example happens in the context of an array where the array itself has been instantiated, but the objects that are elements of the array have not been instantiated.

This video shows a StringIndexOutOfBoundsException caused by indexing beyond the end of a String. This happens in a nested loop, where the inner loop should stop at the end of a word. However, when the end of the string is reached, an erorr is thrown.

Shows a program that is counting the number of words in a Java String. The program gets a stack trace that shows a java.lang.StringIndexOutOfBoundsException. The program is run using a Unix command line and a text editor.

Demonstrates how to read a stack trace.

Shows a program that is counting the number of words in a Java String. The program gets a stack trace that shows a java.lang.StringIndexOutOfBoundsException. The program is run using Eclipse.

Demonstrates how to read a stack trace.

ArrayIndexOutOfBound Exception (Sweedish)

När man kör programmet så får man ett ArrayIndexOutOfBoundsException meddelande, den här videon beskriver vad du ska leta efter för att hitta felet.

Visar på ett program som räknar antalet ord i en mening men som genererar ett StringIndexOutOfBoundsException när man kör det. Videon visar hur man läser ett stack trace för att hitta felet och vikten av att få logiska uttryck i rätt ordning.