08-01 接口 异常 文件IO流

public abstract class Animal {
public abstract void voice();
public abstract void run();
}
public class Dog extends Animal{
public void voice(){
System.out.println("汪汪");
}
public void run(){
System.out.println("狗跑的很快");
}
}
public class Test {
public static void main(String[] args) {
Dog dog=new Dog();
dog.voice();
dog.run();
}
}

public interface Fly {
public void fly();
}
public interface Run {
public void run();
}
public class Plane implements Fly,Run{
@Override
public void fly() {
System.out.println("飞机用引擎飞");
}
@Override
public void run() {
System.out.println("飞机起飞前先助跑");
}
}
public class Bird implements Fly{
@Override
public void fly() {
System.out.println("鸟用翅膀飞");
}
}
public class Car implements Run{
@Override
public void run() {
System.out.println("汽车直接启动，不用助跑");
}
}
public class Test {
public static void main(String[] args) {
Plane plane=new Plane();
plane.fly();
plane.run();
Bird bird=new Bird();
bird.fly();
Car car=new Car();
car.run();
}
}

public interface Ink {
public String getInkColor();
}
public class InkSuzhou implements Ink{
@Override
public String getInkColor() {
return "黑色";
}
}
public class InkOther implements Ink{
@Override
public String getInkColor() {
return "红色";
}
}
public class InkFactory {
public static Ink createink(){
InkSuzhou ink=new InkSuzhou();
return ink;
}
}
public interface Paper {
public String getPaperSize();
}
public class PaperBeijing implements Paper{
@Override
public String getPaperSize() {
// TODO Auto-generated method stub
return "A4";
}
}
public class PaperOther implements Paper{
@Override
public String getPaperSize() {
// TODO Auto-generated method stub
return "B5";
}
}
public class PaperFactory {
public static Paper createpaper(){
PaperBeijing paper=new PaperBeijing();
return paper;
}
}
public interface Print {
public void  print(Paper paper,Ink ink);
}
public class PrintHP implements Print{
@Override
public void print(Paper paper, Ink ink) {
System.out.println("在"+paper.getPaperSize()+"纸上打印"+ink.getInkColor()+"内容");    //在A4打印黑色内容
}
}
public class PrintOther implements Print{
@Override
public void print(Paper paper, Ink ink) {
System.out.println("使用"+paper.getPaperSize()+"纸打印"+ink.getInkColor()+"内容");   //使用A4打印黑色内容
}
}
public class PrintFactory {
public static Print createprint(){
PrintHP print=new PrintHP();
return print;
}
}
public class Test {
public static void main(String[] args) {
Paper paper=PaperFactory.createpaper();
Ink ink=InkFactory.createink();
Print print=PrintFactory.createprint();
print.print(paper, ink);
}
}

public class Student {
private int score;
public int getScore() {
return score;
}
public void setScore(int score) throws Failscores {
if(score<60){
throw new Failscores();
}
this.score = score;
}
}
public class Failscores extends Exception{
public Failscores(){
super("不及格的异常");
}
@Override
public void printStackTrace() {
System.err.println("成绩不理想");
super.printStackTrace();
}
}
public class Test {
public static void main(String[] args) {
/*
//运行时异常
System.out.println(1/0);
*/

/*
//空指针异常,一个引用变量,没有指向任何实际的对象
Student[] stu=new Student[10];
System.out.println(stu[0].getAge());
*/

Student lisi=new Student();
System.out.println("程序开始运行");
try {
lisi.setScore(50);
} catch (Failscores e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("程序运行结束");
}
}

public class Test {
public static void main(String[] args) {
System.out.println("系统开始运行");
File file=new File("d://a.txt");
try {
FileInputStream file1=new FileInputStream(file);
file1.read();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally{
//必须运行，不管是否捕获异常
System.out.println("处理完毕");
}
}
}

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class FileTest {
public static void main(String[] args) {
File file=new File("d://s.txt");
if(file.exists()){
try {
file.createNewFile();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

//文件写入
String words="踏天九境，踏天九桥";
try {
byte[] array=words.getBytes();
FileOutputStream out=new FileOutputStream(file);
out.write(array);
out.flush();
out.close();
System.out.println("文件写入完成");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

//文件输出
System.out.print("文件内容：");
byte[] array=new byte[1024];
try {
FileInputStream in=new FileInputStream(file);
int num=in.read(array);
while(num!=-1){
System.out.println(new String(array, 0, num));
num=in.read(array);
}
in.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

//写在类内部的类

public class Student {
private String name;
private int age;
public void study(){
System.out.println(this.name+"正在学习");
}
public String getName() {
System.out.println("姓名:"+name);
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
System.out.println("年龄:"+age);
return age;
}
public void setAge(int age) {
this.age = age;
}
public class Pen{
String name;
String color;
public void write(){
System.out.println(Student.this.name+"写点东西");
}
public String getName() {
System.out.println("类型:"+name);
return name;
}
public void setName(String name) {
this.name = name;
}
public String getColor() {
System.out.println("颜色:"+color);
return color;
}
public void setColor(String color) {
this.color = color;
}
}
}
public class Test {
public static void main(String[] args) {
Student lisi=new Student();
lisi.setName("李斯");
lisi.setAge(18);
System.out.println(lisi.getName());
System.out.println(lisi.getAge());
lisi.study();

Pen pen=lisi.new Pen();
pen.setName("钢笔");
pen.setColor("蓝色");
System.out.println(pen.getName());
System.out.println(pen.getColor());
pen.write();
}
}

//写在方法中的类

public class Student {
private String name;
public void study(){
class Book{
String bookName="三国演义";
public void read(){
System.out.println(bookName);
}
}
Book book=new Book();
System.out.print(Student.this.name+"正在学习");
book.read();
}
}
public class Test {
public static void main(String[] args) {
Student lisi=new Student();
lisi.setName("李斯");
lisi.study();
}
}

//匿名内部类，当只使用一次时

Paper paper=new Paper(){
@Override
public String getPaperSize() {
return "A4";
}
};

//手机号 13 15 18
Pattern p=Pattern.compile("^1(3|5|8)\\d{9}$");
Matcher m=p.matcher("13445698735");
boolean b=m.matches();
System.out.println(b);

//身份证号 18位，最后一位可能是x或X
Pattern p=Pattern.compile("^\\d{17}(x|X|\\d)$");
Matcher m=p.matcher("13068219990205541x");
boolean b=m.matches();
System.out.println(b);

//邮箱 xxxx@xxx.com|.cn|.net
Pattern p=Pattern.compile("^\\p{Alnum}{1,}\\@\\p{Alnum}+\\.(com|cn|net)$");
Matcher m=p.matcher("asd@163.com");
boolean b=m.matches();
System.out.println(b);

Date date=new Date();
System.out.println(date.toString());
System.out.println(date.getTime());

Calendar rightNow=Calendar.getInstance();
System.out.println(rightNow.get(Calendar.YEAR));
System.out.println(rightNow.get((Calendar.MONTH))+1);
System.out.println(rightNow.get(Calendar.DAY_OF_MONTH));
rightNow.set(Calendar.DAY_OF_YEAR, rightNow.get(Calendar.DAY_OF_YEAR)+5);
System.out.println(rightNow.get(Calendar.DAY_OF_MONTH));

SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日   HH:mm:ss");
System.out.println(format.format(date));
SimpleDateFormat format1=new SimpleDateFormat("yyyy年MM月dd日   HH:mm:ss");
String time="2015年08月01日   16:00:26";
try {
Date date1=format1.parse(time);
System.out.println(date1.getTime());
} catch (ParseException e) {
e.printStackTrace();
}