qq_36010523的博客

interface:All methods must be public.All variables must be public static final.Cannot be instantiatedAll methods are by default abstract unless specified to be defaultCan implement more than one interface per classabstract class:Methods can be pu

You may be wondering, how does Java know which print() to call? Good question. Java is able to do this due to something called dynamic method selection.We know that variables in java have a type.List61B<String> lst = new SLList<String>();In

In this lab, you will learn about Unit Testing, JUnit, the 61B style checker, and we’ll also get a bit more debugging experience.If you just want to use the renderer that you already selected, you can bypass having to pick between the two renderers in any

目录一道不明白意思的题目经常要犹豫很久担心写错的删重一道不明白意思的题目经常要犹豫很久担心写错的删重

LinkedList练习）插入节点在原有链表的基础上逆转元素顺序插入节点在以下代码的基础上完成插入节点的功能。例如：5–6--2，insert (10,1) result in 5–10–6--2.这里的position是从0开始的public class SLList{ private class IntNode{ public int item; public IntNode next; public IntNode(int item, IntNode next){ thi

1.copy一个行星构造函数不会写2.常数用 static final 修饰比较好3.java支持科学记数法，例如 1.03e-7;4.foreach循环的使用 for( type name : arrayname);

“老是忘记这个…”if a subclass has a method with the exact same signature as in the “superclass”, we say the subclass overrides the method.Methods with the same name but different signatures are overloaded.