如何打印创建的类？

Question

这是我当前的代码-public class TriangleNumGenerator {  int counter;  int sides;  public TriangleNumGenerator(){    sides = 1;    counter = 2  }  public int nextTri(){    sides = sides+counter;    counter = counter+1;    return sides;  }  public void reset(){    counter = 2;    sides = 1;  }}Main(){  TriangleNumGenerator ne = new TriangleNumGenerator();  System.out.println(ne.nextTri());}这段代码应该做的是每当 nextTri 被调用时，它就会打印“1,3,6,10”等等。但是，该代码似乎根本没有打印任何内容。我如何让这个类真正运行？

Answer 1

需要进行一些更新，我已将其添加到评论中：

public class TriangleNumGenerator {

    int counter;

    int sides;

    public TriangleNumGenerator(){

        sides = 1;

        counter = 2;  // forgot ; here**

    }

    public int nextTri(){

        sides = sides+counter;

        counter = counter+1;

        return sides;

    }

    public void reset(){

        counter = 2;

        sides = 1;

    }

    // you forgot main method; it has to be exactly same so that JVM 

    // can find it

    public static void main(String[] args) {

        TriangleNumGenerator ne = new TriangleNumGenerator();

        System.out.println(ne.nextTri());  // forgot () in nextTri

    }

}

这些是语法错误。如果您使用任何IDE，那么所有这些都应该报告！