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Download Java 21 Windows zip from https://jdk.java.net/archive/ Unzip and place it in any directory you like: Set JAVA_HOME environment variable Click on environment variables Add JAVA_HOME/bin to PATH variable Select PATH and click Edit: Then Click New Enter “%JAVA_HOME%\bin” and click “Ok” Verify Java 21 is installed: Open Command Line: Type “java -version” and press…

Use Integer.parseInt Catch the exception if you want to handle the conversion error: