先创建一个Point类，然后定义Trianglele类

[{"title":"（ 11 个子文件 5KB ） 先创建一个Point类，然后定义Trianglele类","children":[{"title":"shiyansi","children":[{"title":"bin","children":[{"title":"J_sharp.class <span style='color:#111;'> 116B </span>","children":null,"spread":false},{"title":"J_Circle.class <span style='color:#111;'> 412B </span>","children":null,"spread":false},{"title":"J_Rectangle.class <span style='color:#111;'> 496B </span>","children":null,"spread":false},{"title":"J_Area.class <span style='color:#111;'> 1.04KB </span>","children":null,"spread":false}],"spread":true},{"title":".settings","children":[{"title":"org.eclipse.jdt.core.prefs <span style='color:#111;'> 629B </span>","children":null,"spread":false}],"spread":true},{"title":"src","children":[{"title":"J_Rectangle.java <span style='color:#111;'> 262B </span>","children":null,"spread":false},{"title":"J_sharp.java <span style='color:#111;'> 57B </span>","children":null,"spread":false},{"title":"J_Circle.java <span style='color:#111;'> 158B </span>","children":null,"spread":false},{"title":"J_Area.java <span style='color:#111;'> 458B </span>","children":null,"spread":false}],"spread":true},{"title":".project <span style='color:#111;'> 384B </span>","children":null,"spread":false},{"title":".classpath <span style='color:#111;'> 301B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]