10 Common Mistakes That Java Beginners Often Makes

by Arnav Patel · Published February 3, 2016 · Updated September 26, 2016

Since Java advent in 1995, Java has changed our lives and exceeding the expectations of people. The Sun Microsystem team that worked on the clock to develop this programming language targeted digital television industry. So, Java was too advanced at that time, Java was also perfect for the internet and other applications.

Over the time, Java has spread everywhere and it’s created own special place in programming world. The language is easy to learn but most of people do 10 common mistakes in Java programming.

This list is based upon the study of 250,000 java programming beginners from all over the world by the Data scientists. Using around 37 million compilations, they revealed the most common errors a developer makes during coding in Java.

Also Read: Google Secret Project SkyBender To Bring internet 40 Times Faster Than 4G LTE

10 Common Mistakes Every Beginners Java Programmers Makes

Let’s go ahead, here’s is top 10 most common errors made by every beginner Java programmer.

Unbalanced parentheses, curly braces, brackets, and quotation marks, or using these different symbols interchangeably, such as in: while (a == 0].
Invoking methods with wrong arguments or argument types, such asin:get(“abc”).
Control flow can reach end of non-void method without returning, such as in:

1

2

3

4

5

6

7

<em>public int foo(int x)

{

if (x < 0)

return 0;

x += 1;

}

</em>

Confusing the assignment operator (=) with the comparison operator (==), such as in: if (a = b).
Ignoring or discarding the return value of a method with non-void return type, such as in: toString();.
Use of ==instead of .equals to compare strings.
Trying to invoke a non-static method as if it was static, such asin:toString();.
Class claims to implement an interface, but does not implement all the required methods, such as in:class Y implements ActionListener { }.
Invoking the types of parameters when invoking a method, such as in:foo(int x, String s);.
Incorrect semicolon in ifstatements or forand while loops, such as in: if (a==b); return 6;

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