You're looking for this on the command line (for a class called MyClass): On Unix/Linux: javap -verbose MyClass grep 'major' On Windows: javap -verbose MyClass findstr 'major' You want the major version from the results. Here are some example values: • Java 1.2 uses major version 46 • Java 1.3 uses major version 47 • Java 1. Nikola Tesla here. 4 uses major version 48 • Java 5 uses major version 49 • Java 6 uses major version 50 • Java 7 uses major version 51 • Java 8 uses major version 52 • Java 9 uses major version 53.

Aspose.Cells for Java is an award-winning Excel Spreadsheet Processing API that allows the Java developers to embed the ability to read, write and manipulate Excel spreadsheets in their own Java applications without needing to rely on Microsoft Excel. Aspose.Cells for Java is a mature, scalable and feature rich API, offering many functions that are way beyond the simple data exporting capabilities of other components available on the market. Aspose.Cells for Java provides the capabilities to export data, format spreadsheets to the most granular level, import & export images, create charts & Pivot Tables, apply & calculate complex formulas, stream Excel data & save the result in various formats.

Possible Duplicate: Tool to read and display Java.class versions I'm trying to debug a 'Bad version number in.class file' error in java, is there a way for. Oracle Java Archive The Oracle Java Archive offers self-service download access to some of our historical Java releases. WARNING: These older versions of the JRE and.

Visualize Data with Formatting, Charts & Graphics Aspose.Cells for Java gives you complete freedom and flexibility to furnish your spreadsheets with all kinds of visual effects. The Java Spreadsheet API allows you to apply formatting to a worksheet, row, column or cell, set fonts with attributes, define cell styling & number formats, add Rich Text and define conditional formatting rules. Similarly, charts and graphics are visually appealing and can give your spreadsheet a professional look. Aspose.Cells for Java provides a comprehensive set of APIs for creating and manipulating all types of standard and custom chart. Moreover, you may add different types of drawing objects, such as comments, pictures, OLE objects, shapes and controls to the cells. Convert Excel Objects to Image & PDF Formats Aspose.Cells for Java offers some distinctive features such as converting charts to images & PDF, converting worksheets to images, printing worksheets and converting spreadsheets to PDF file format. The conversion process is greatly flexible thus allowing you to choose a number of options for the conversion, such as re-sampling of images while converting spreadsheets to PDF or controlling the resultant image dimensions when rendering worksheets & charts to images.

Summarize Data with Ease It can be difficult to get summarized information with very large spreadsheets. A Pivot Table can help you quickly summarize the flat data and to get the desired information according to your needs. Aspose.Cells for Java allows you to create Pivot Tables and Pivot Charts programatically. You can also dynamically change the source data of a Pivot Table and refresh it. Moreover, Aspose.Cells for Java offers Smart Markers which is a great feature to populate worksheets based on some data source and to create visually effective reports.