先添加一个类 my / Triangle.java
package my;
public class Triangle
{
public int a = 1;
public int b = 1;
public int c = 1;
}
在 HelloWorld.java 里调用
package my;
public class HelloWorld
{
public static void main(String[] args)
{
Triangle t = new Triangle();
t.a = 3;
t.b = 4;
t.c = 5;
System.out.println("三角形: " + t.a + “,” + t.b + “,” + t.c);
}
}