Both remainder and modulo are two similar operations; they act the same when the numbers are positive but much differently when the numbers are negative. In Java, we can use Math.floorMod() to describe a modulo (or modulus) operation and % operator for the remainder operation.

• Java 7u17
• Java 7u40

See the result:

In a nutshell:

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• `Remainder (rem)“ = The result has the same sign (+ or -) as the dividend (first operand).
• `Modulo (mod)“ = the result has the same sign (+ or -) as the divisor (second operand).

**Further Reading- **Wikipedia – Modulo Operation

1. Remainder vs Modulo

1.1 Remainder Operator %

Let see an example to print each remainder from dividend -10 to 10 and a divisor of 3.

Output

For divisor = -3

With the remainder %, the result has the same sign as the dividend (first operand).

1.2 Modulo with Math.floorMod

Let see an example to print each modulo from dividend -10 to 10 and a divisor of 3.

Output

For divisor = -3

With the modulo, the result has the same sign as the divisor (second operand).

2. Common pitfalls – Find Odd numbers.

This example uses % remainder to check if a given number is an odd number. For negative numbers, it can lead to an unexpected results.

Output

For % remainder operator, the result has the sign (+ or -) of dividends (first operand). For example -3 % 2 = -1, the above isOdd() will return false.

One of the possible answers is test if the remainder is not equal to zero ( 0 has no sign (+ or -)).

Output

References

Hello SAP GUI for Java users,

In addition to bug fixes, the quarterly updates of SAP GUI for Java 7.50 have been including many improvements like support for new OS versions, the switch to OpenJDK, support for Java 11, the inclusion of the Java runtime in the installer and just recently a new component for rendering PDF content.

Doing all this as part of updates ensured the fastest possible adoption, which was critical in particular in the case of OpenJDK to address the new license of the Oracle JDK.

All these changes were smooth and non-disruptive and therefore possible in a maintenance release.

Now, some necessary changes are on the way, that are disruptive. So a new major release is required.

The upcoming SAP GUI for Java 7.70 will require Java 11 as a minimum. This results in dropping support for all 32-bit environments, since SapMachine only supports 64-bit platforms. Also Java 11 does not provide a Java plug-in for browsers required for running Java applets in the browser. Therefore SAP GUI for Java 7.70 will not be able to run embedded in a browser.

But, this new release is not only for dropping anachronistic environments and functionality, but also for introducing new features.

• Themes
  • Quartz: Quartz Light, Quartz Dark as well as the High Contrast Black (HCB) and High Contrast White (HCW) versions provide a Fiori-like user experience. While Quartz Light can be considered the successor of Belize, Quartz Dark is the first theme for working in low light environments.
    The new Quartz HCB replaces the old High Contrast theme based on Signature Design for users with visual impairment. Users who need a high contrast theme but are not glared by a bright background also can use the new HCW theme. This theme is also helpful for working in bright environments like outdoor.

• • Belize: The previous Fiori theme is included as well.
  • SAP GUI for Java keeps the classic screen metrics and window layout for compatibility reasons.
  • The outdated themes Corbu and the original High Contrast theme based on Signature Design have been removed.
• High Resolution Icons
  • When using one of the new themes, for session windows and all local dialogs the icons are displayed with high resolution to support HiDPI displays.
• Installer
  • In addition to the jar based installers, new installers with a native launcher stub are available, which no longer need a preinstalled Java runtime.
• Keyboard navigation:
  • Keyboard navigation has been reviewed, some controls not having keyboard support before have been made accessible using the keyboard.
• Focus Visualization:
  • Now also the dotted focus can display an animated focus change.
  • The visualization of the focus in high contrast themes has been improved.
• Preferences Dialog
  • The preferences dialog has been modernised for the new themes.
• Documentation:
  • The manual has been reviewed and is available on the SAP Help Portal.
  • A new document for keyboard access with a description for each UI element has been added.

The release of SAP GUI for Java 7.70 is planned for spring 2021 (aka “fiori” season).

Java 7u17

As outlined in the other post, there will be a beta program for early adopters.

Best regards,

Java 7u40

Rolf-Martin Wörsinger
Product Owner SAP GUI for Java