Author: Moses N

The illegal start of an expression is a java error during the compile-time with the “javac” compiler. When the compiler detects that a statement does not follow the syntax rules of the java programming language, an illegal start of expression error message is displayed. These errors can occur due to so many reasons. In most cases, they are straightforward to solve as long as you can locate the line of code with the error. It can be as simple as caused by an omitting closing or opening bracket or a missing semicolon at the end of a line.

The java unreachable statement is a compilation error thrown when the compiler detects a code that was not executed as part of the program. When you reach this state, it means that your program would not be executed anymore, and hence this piece of code is unnecessary and should be removed.

The goal of every programmer is to save time in both programming and debugging. However, there comes a time when you write hundreds of lines of code. It’s very frustrating having to repeat the same code now and then. It is more frustrating when your code gets some error, and you will need to debug the whole program.

I was in the process of creating a simple calculator in java using Swing. My input fields include JTextFieald and JTextArea. These input fields are String, but I needed to deal with Integers in a calculator due to the mathematical calculations. This led me to thoughts of how I would be able to convert these Strings into integers?  That’s when I came across these two beneficial methods. The Integer.parseInt() and Interger.valueOf().

If you are a newbie to Java or even an experienced programmer, you may face a situation where you need to transverse through all the elements of a collection, display the elements one by one, or even retrieve each of the elements. This is where your knowledge of iterators will be at the test.

Arrays are one of the most important data structures in our daily life. An array is a group of similar typed variables that are referred to by a common. In other words, we can define it as a contiguous memory location that stores data of the same type. Arrays offer a convenient means of grouping data items.