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WDD_lec_05 - Web Design Development Lecture 5 Common Errors...

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Lecture 5
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Common Errors
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Common Errors NoClassDefFoundError NoSuchMethodError: main Cannot resolve symbol Local variables must be initialized ArrayIndexOutofBounds & NumberFormat exception
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Error: Exception in thread “main” NoClassDefFoundError public class CommonErrors{ public static void main (String args[]) { System.out.println(“Hello World”); } }
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Error: Exception in thread “main” NoSuchMethodError: main public class CommonErrors{ public static void display () { System.out.println(“hello world”); } } public static void main (String args[]) { CommonErrors.display(); }
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Error: cannot resolve symbol public class CommonErrors{ public static void main (String args[]) { int number; System.out.println(number1); } } number );
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Error: Local variable not initialized public class CommonErrors{ public static void main (String args[]) { int number ; System.out.println(number); } } = 10 ;
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Error: ArrayIndexOutofBoundsException public class CommonErrors{ public static void main (String args[]) { System.out.println(args[0]); } }
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Error: NumberFormatException public class CommonErrors{ public static void main (String args[]) { String s = “20s”; int number = Integer.parseInt(s); } } = “20” ;
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Error: NullPointerException public class CommonErrors{ public static void main (String args[ ]) { Student s = null; s.print( ); } }
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How to Use Java Doc
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WDD_lec_05 - Web Design Development Lecture 5 Common Errors...

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