Add support for JDK version 24

[clin1234]

C:\Users\שזדס\scoop\apps\temurin-nightly-jdk\current\bin\java.exe -version
openjdk version "24-beta" 2025-03-18
OpenJDK Runtime Environment Temurin-24+11-202408151908 (build 24-beta+11-ea)
OpenJDK 64-Bit Server VM Temurin-24+11-202408151908 (build 24-beta+11-ea, mixed mode, sharing)

[pmonks]

For anyone else encountering this error message, on OpenJDK 64-Bit Server VM Temurin-24+36 on macOS, I get the following error on startup:

WARNING: package com.sun.java.swing.plaf.gtk not in java.desktop
WARNING: package sun.awt.X11 not in java.desktop
Error occurred during initialization of VM
java.lang.Error: A command line option has attempted to allow or enable the Security Manager. Enabling a Security Manager is not supported.
	at java.lang.System.initPhase3(java.base@24/System.java:1947)

This works fine on OpenJDK 64-Bit Server VM Temurin-21.0.6+7 on macOS, so I assume it's something specific to JDK version 24.

[thurka]

Fixed in master.

[kamalhm]

hi @thurka thanks for this. any idea when this will be released? should i just compile from source?

[thurka]

The new version of VisualVM will be released in the near future. In the meatime, the easiest workaround is to run VisualVM on JDK 23 or older using --jdkhome option.

[thurka]

FYI: VisualVM 2.2 with JDK 24 support was released.