dududu1224-优快云博客

原创二叉树基本概念

import java.util.Arrays; class Link{ private class Node{ private Node right; private Node left; private Comparable data; public Node(Comparable data){ th

2017-08-29 18:46:09 252

原创 Hello world输出2（函数输出）

import java.util.function.*;enum num{ Hello,world, } interface World{ public void print(); } class Message extends Thread{ private String num; public Message(String num){ this.n

2017-08-22 19:44:15 1168

原创 hello world 的各种输出方式（1）闲的蛋疼

class Person{ private String name; public String getName() { return name; } public void setName(String name) { this.name = name; }} class Member{ private Member(){

2017-08-17 21:51:37 1676

原创简单链表类（宠物商店模型）

interface ILink{} class Link implements ILink{ private class Node{ private Object data; private Node next; public Node(Object data){ this.data=data; }

2017-08-15 21:06:36 341

原创简单链表练习

class A{ private class B{ private B next;//**节点** private Object data; public B(Object data){ this.data=data; } public void addB(B b){

2017-08-14 20:24:43 299

原创递归算法求阶乘和

public class factorail { public static void main(String args[]) { int sum=0; for (int counter = 0; counter <= 10; counter++){ System.out.println(counter+"!="+getNumbe

2017-08-07 14:04:56 1114

原创接口（简单概念）

//factory //工厂类 interface IFruit{ public void eat(); } class Factory{ public static IFruit getInstance(String className){ if("apple".equals(className)){ return new Apple();

2017-07-31 20:15:47 189

原创简单（自动猜数字）

class Player{ int number; public void guess(){ number=(int)(Math.random()*100); System.out.println("我猜是"+number); } } class GuessGame{ Player p1; Player p2; Play

2017-07-27 15:19:15 801

原创数组操作（进阶）

class Array{ private int data[]; private int foot=0; public Array(int len){//设置数组长度 if(len>0){ this.data=new int[len]; }else{ this.data=new int[1];

2017-07-26 10:42:50 275

原创 java继承基本概念练习

class Person1{ private String name; public void setName(String name){ this.name=name; } public String getName(){ return this.name; } public Person1(){ System

2017-07-20 19:26:22 323

原创内部类概念简单练习

package 内部类; class Outer{ private String msg="hello word!"; private class Inner{//private 定义的内部类不能程序外部直接调用 public void print(){ System.out.println(msg);//Out。this

2017-07-18 22:20:27 294

原创 static关键字简单应用

//自动命名+简单计数 class Person1{ private String name; private static int count; public Person1(){ this("name="+ ++count); System.out.println(count); } public Person1(Strin

2017-07-17 19:05:37 185

原创简单类（练习3）部门，雇员，职位，权限

class Dept{//部门信息 private int did; private String dname; private Emp[] emps; private Role role; public Dept(int did,String dname){ this.did=did; this.dname=dname;

2017-07-16 18:13:57 347

原创简单类（多对多练习）

class Student{ private int id; private String name; private Studentcourse[] studentcourse; public Student(){ } public Student(int id,String name){ this.id=id; thi

2017-07-15 19:02:29 344

原创简单类（进阶）

package javac; class Dept{ private String name; private String num; private Emp[] emps; private Emp mgr; public void setName(String name){ this.name=name; } public S

2017-07-14 17:27:02 207

原创简单应用传递练习

package yingyongchuandi; class Text{ private String name; private int age; private Data data; private Text text1; public Text(String name,int age){ this.name=name; th

2017-07-13 19:53:48 265

原创 String首字母大写操作

package String; //首字母大写操作 public class initcap { public static void main(String args[]){ String data=”helloworld”; System.out.println(initcap(data)); System.out.printl

2017-07-09 20:21:44 340

原创 String 类------字符串转字符数组判断字符串中是否含有字母

//toCharArray() public class Array{ //判断数组是全否由数字组成 public static void main(String args[]){ String data="a123456"; char[] arr=data.toCharArray(); for(int x=0;x<arr.length

2017-07-06 12:46:30 511

原创简单数组查找

public class Array{ public static void main(String args[]){ int data[]=new int[]{ 1,2,3 }; int search=2; System.out.print(search(data,search)); } pu

2017-07-02 21:14:59 201

原创数组进阶对象数组

class Student{ private String id; private String name; private int grade; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { retur

2017-07-02 21:12:44 228

原创二维数组置换

public class Array { public static void main(String args[]){ int data[][]= new int [][]{{1,2,3},{4,5,6},{7,8,9}}; sort(data); printArray(data); } public static void sort(int arr[

2017-07-02 11:42:22 425

原创数组进阶-数组倒置

public class Array { public static void main(String args[]){ int data[]= new int []{1,5,3,4,2,7,9,8}; sort(data); printArray(data); } public static void sort(int arr[]){

2017-07-02 10:04:18 298

原创数组进阶找出最大或最小值

public class Array { public static void main(String args[]){ int dataA[]= new int []{1,2,3,4,5,7,8,9}; int max=dataA[0]; int min=dataA[0]; printArray(dataA); for(int y=1;y<dataA.

2017-07-01 13:27:30 262

原创 for循环进阶练习

//菱形 public class Tuxing{ public static void main(String arg[]){ for(int x=1;x<=3;x++){ for(int y=4;y>=x;--y){ System.out.print(" "); }

2017-06-30 19:02:22 343

原创简单数组练习

//完整的静态初始化数组public class Array { public static void main(String args[]){ String name[]=new String[]{"10","20"};// System.out.println(name.length); for(int x=0;x<=name.length

2017-06-30 13:22:23 246

原创 for语句的简单练习打印三角九九乘法表累加

//for语句的简单练习 //九九乘法表 public class Text{ public static void main(String arg[]){ for(int x=1;x<=9;x++){ for(int y=1;y<=x;y++){ System.out.print(x+"*"+y+"="+x*y+" ");

2017-06-30 10:58:35 682

原创 3个简单类练习

代码块//学生类 class Student{ private String name; private int sno; private int age; private int grade; private int englishscore; private int sex; public Student(){ } publi

2017-06-29 20:47:34 493

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