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update:demo2

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dichgrem
2025-10-31 17:01:12 +08:00
parent af1ea3e24e
commit d765c1a219
8 changed files with 214 additions and 0 deletions
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18
com/study/demo2/Rectangle_Main.java Normal file
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package com.study.demo2;
public class Main {
public static void main(String[] args) {
Rectangle rect1 = new Rectangle(5.0, 3.0);
System.out.println("面积:" + rect1.getArea());
System.out.println("周长:" + rect1.getPerimeter());
Rectangle rect2 = new Rectangle();
System.out.println("默认面积:" + rect2.getArea());
System.out.println("默认周长:" + rect2.getPerimeter());
rect2.setWidth(2.5);
rect2.setHeight(4.0);
System.out.println("修改后面积:" + rect2.getArea());
System.out.println("修改后周长:" + rect2.getPerimeter());
}
}