"Error: Could not find or load main class My.class"
cmd, command-prompt, java
Solution
You should specify the classname instead of the file of the class to load. The difference is a simple matter of removing the `.class` extension.
Problem
Im using Java SDK 1.7 on Windows 7 via cmd.exe . Up until a few hours ago everything was working correctly when suddenly I was unable to run my compiled class files, consistently presented with the error in the title. I seem to be able to compile my My.java file however I am unable to run the resulting class file (My.class). I am constantly given the error "Error: Could not find or load main class My.class". I have tried this with multiple other class files all resulting in the same problem. My 'Path' environment variable is set to "C:\Program Files (x86)\Java\jdk1.7.0_05\bin" if you were wondering I have tried reinstalling, creating and setting a classpath variable (no luck), and even directly using the `java -cp . My.class` command. I have tried these posts all to no avail, hence why I'm posting: Error: Could not find or load main class Error: Could not find or load main class- Novice Could not find or load main class Java 1.7.0_03 Error: Could not find or load main class If it makes any difference my code is : ``` import javax.swing.JOptionPane; class My { public static void main(String[] args) { final double x = 3.2; int i = (int)x; double m = 0; if (x < 4) { String saySomething = JOptionPane.showInputDialog(i); System.out.println(saySomething); } else { String saySomething = JOptionPane.showInputDialog(i); System.out.println("Hello World"); } while (m < 10) { System.out.print(" While Loop "); m++; }; for (i=1; i < 10; i++) { System.out.println("For Loop"); }; } } ```