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Don't use tabs to indent code; use spaces only. Follow the indentation guidelines in the relevant coding-style guide. For most programming languages, that means indent by two spaces per indentation level. However, some contexts, such as Python and the Android Open Source Project, use four spaces.

Let's go through it... Null Checks. We know NullPointerException is the most common exception in Java and can cause big problems. ... Exception Handling. ... Code Indentation and Formatting. ... Optimize Imports. ... Static Code Review Tools. ... Constants. ... Naming Conventions. ... Not All One-Liners.

In Java, a class definition starts with the word "class" (possibly preceded by the word "public" or "private"), continues with the name of the class and the character "{" (a left brace or curly bracket), and ends with the character "}" (a right brace). Inside the braces are definitions of methods and variables.

Class names should be nouns, in mixed case with the first letter of each internal word capitalized. Try to keep your class names simple and descriptive. Use whole words-avoid acronyms and abbreviations (unless the abbreviation is much more widely used than the long form, such as URL or HTML).

Coding standards, also known as coding guidelines or programming style guides, are rules and conventions that developers follow when writing code. These rules define the code characteristics necessary to maintain a uniform codebase and facilitate collaboration among developers.

The recognized standard for increasing readability of each line is: Apply indentation to alike items in a vertical list (such as end-of-line comments, and identifiers in declarations). Surround the binary operators (including assignment) by spaces. Follow a semicolon or comma by a space.

Coding Standards for Classes: Usually class name should be noun starting with uppercase letter. If it contains multiple word than every inner word should start with uppercase. Coding Standards for Interface: Usually interface name should be adjective starting with uppercase letter.

Java class, field, method, and variable names are written in CamelCase: Words are smashed together and the first letter of each word is capitalized. No word separator, like the underscore _, is used.