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6. After configuring the environment variables, you can enter the cmd to check whether Java is installed correctly. The check command is java-version, as shown in the figure:Happy to watch and post, everyone, the code word is not easy, and the recommendation wave is smooth, so that more people can see it.Three, run block? Command to fill in "Elevation" in "Name" of "Block Definition" window; Click the button to the left of "Pickup Point" and the "Block Definition" window will be temporarily hidden. Capture and click the corner point under the triangle on the graph, and the window will reappear. Click the button on the left side of "Select Object" and the "Block Definition" window will be temporarily hidden again. After selecting the whole graphic, press Enter and the window will appear again. Click Convert to Block; Click OK to close the Block Definition window.Application scenario: Mediator mode is generally applied to situations where a group of objects communicate in a well-defined but complex way, and situations where you want to customize a behavior distributed in multiple classes but do not want to generate too many subclasses.刘邦有些不忿，暗自下决心，什么时候一定要打败项羽，让这些诸侯们知道谁才是真正的王者，让他们真正地臣服于自己。九儿道：你真笨。