Welcome, dear coder! Today, we're going to tackle error messages in Java. Consider these messages as signposts, guiding us to fix glitches in our Java program. Let's go!

Error messages in Java are crucial signals of problems in our code. Typically, an error message contains three key parts: the type of error, the location of the error (class name and line number), and a brief error description.

Let's examine the following:

In this case, the compiler trips over a small error — a missing closing quotation mark. The error message provides our first clue about what's going wrong. The error will be:

See? The error mentions the file name, the line where the error happens, as well as the cause itself - the string literal (") is not closed.

Every Java program is executed in two steps - first, it compiles code, generating a machine-readable format that is called bytecode (located in .class files), and once the code is compiled - it is executed.

Compile-time errors appear when our Java file is being compiled. These are typically syntax errors — like unclosed string literals and missing semicolons. Let's revisit our previous error: