Friends who use Eclipse know that it has the function of mouseover prompts (mainly variable type declarations and Doc help prompts). The pop-up window obstructs the line of sight and affects thinking. The closing method is as follows: Window (window) -> Preferences (first Options)->Java->Editor (editor)->Hovers (hovering prompt) Cancel [Combined Hover] (combined hovering prompt)
Eclipse Instructions - Prompt Bar that pops up automatically
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