Boost Your Java Debugging with IntelliJ IDEA 2020.1’s New Data‑Flow and Performance Tools

Data‑flow analysis assistance

IntelliJ IDEA 2020.1 adds a data‑flow analysis helper to the debugger. When execution stops at a breakpoint, the IDE runs a data‑flow analysis based on the current program state and predicts possible exceptions, highlighting conditions that are always true or always false.

Pinned variables in the debugger

A new feature lets you pin frequently inspected fields so they remain visible while stepping through code, eliminating the need to repeatedly scroll or expand objects.

IPv6 remote debugging

The IDE now supports establishing remote debugging sessions over IPv6, enabling connections to machines that are reachable only via IPv6 addresses.

CPU profiling refinements

The CPU profiler provides four filtering options to focus or exclude specific call nodes:

Focus on a subset of calls

Focus on the current call

Exclude a subset of calls

Exclude the current call

Additionally, you can skip recursive calls to obtain a clearer performance picture.

Memory‑snapshot (hprof) support

IDEA can now open .hprof memory‑snapshot files without excessive memory consumption. After opening, a simple heap view is displayed; advanced analysis features are planned for future releases.

Commit UI redesign

The commit dialog has been redesigned with a cleaner layout for staging changes and composing commit messages.

LightEdit mode

LightEdit provides a lightweight text editor that can be launched from the command line for quick file edits, offering a reduced feature set compared to the full IDE.

Intention preview

Pressing the default shortcut ( Alt + Space) shows IDEA’s suggested quick‑fixes or intention actions. Before applying a change, a preview of the resulting code is displayed, allowing you to confirm or cancel the modification.

Zen mode

Zen mode offers a distraction‑free full‑screen environment, improving on the previous fullscreen mode by better handling focus and UI elements.