回答
0x15afe400 JavaThread"JavaFX Application Thread"[_thread_in_native,id=9616,stack(0x16340000,0x16390000)] 0x15af8800 JavaThread"Thread-1"daemon[_thread_blocked,id=9448,stack(0x15750000,0x157a0000)] 0x...
回答
TrianglePane.java:9:error:cannot find symbol import javafx.collections;symbol:class collections location:package javafx [loading ZipFileIndexFileObject[C:\Program Files(x86)\Java\jdk1.8.0_241\jre\lib\...