https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html?utm_source=chatgpt.com
https://www.runoob.com/java/java8-lambda-expressions.html?utm_source=chatgpt.com
https://hackmd.io/%40AlienHackMd/java_lambda-functional?utm_source=chatgpt.com
https://hackmd.io/%40KaiChen/SJ0wl8Nc8?utm_source=chatgpt.com
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