package kaoshi; public class SellTicket { public static void main(String[] args) { Ticket ticket=new Ticket(); new Thread(ticket,"一号窗口").start(); new Thread(ticket,"二号窗口").start(); new Thread(ticket,"三号窗口").start(); new Thread(ticket,"四号窗口").start(); new Thread(ticket,"五号窗口").start(); } } class Ticket implements Runnable{ private int ticket=100; public void run() { this.sell(); } public synchronized void sell() { while (true) { if (ticket<1) { System.out.println("票卖完了!"); System.exit(0); } System.out.println(Thread.currentThread().getName()+"卖出第"+(ticket--)+"张票"); try { Thread.sleep(100); notifyAll(); wait(); } catch (InterruptedException e) { // TODO: handle exception e.printStackTrace(); } } } }第二题:文件读写
package kaoshi; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; public class FileRead { public static void main(String[] args) throws IOException { BufferedReader read = null; BufferedWriter out = null; try { read=new BufferedReader(new FileReader("a.txt")); out=new BufferedWriter(new FileWriter("b.txt")); String r; while((r=read.readLine())!=null) { String w=null; String[] reads = r.split(""); w=reads[0]+"+"+reads[1]+"="+(Integer.parseInt(reads[0])+Integer.parseInt(reads[1])); out.write(w+"rn"); } } catch (IOException e) { // TODO 自动生成的 catch 块 e.printStackTrace(); }finally { read.close(); out.close(); } } }第三题:Point和Circle类
package kaoshi; public class PointAndCircle { public static void main(String[] args) { Point point=new Point(1, 1); Circle cirlce=new Circle(1, 1, 1); System.out.println(point.getDistance(2, 2)); System.out.println(cirlce.getArea()); } } class Point{ private double x; private double y; public Point(double x,double y) { this.x=x; this.y=y; } public void setX(double x){ this.x=x; } public void setY(double y){ this.y=y; } public double getX() { return this.x; } public double getY() { return this.y; } public double getDistance(double x,double y){ return Math.sqrt(Math.pow(this.x-x,2)+Math.pow(this.y-y, 2)); } } class Circle extends Point{ private double r; public Circle(double x, double y,double r) { super(x, y); this.r = r; } public double getR() { return r; } public void setR(double r) { this.r = r; } public Point getPoint() { return new Point(super.getX(),super.getY()); } public double getArea() { return Math.PI*this.r*this.r; } }第四题:Rect类和梯形类
class Rect{ private double len; private double width; public Rect(double len,double width) { this.len=len; this.width=width; } public double getArea() { return this.len*this.width; } public double getLen() { return this.len*2+2*this.width; } } class Tixing{ private double slen; private double xlen; private double high; public Tixing(double slen, double xlen, double high) { this.slen = slen; this.xlen = xlen; this.high = high; } public double getArea() { return (this.slen+this.xlen)*this.high/2; } }第五题:最大公约数最小公倍数
package kaoshi; import java.time.chrono.MinguoChronology; import java.util.Scanner; public class MaxAndMin { public static int Max(int a,int b) { while(b!=0) { int i=a%b; a=b; b=i; } return a; } public static int Min(int a,int b) { int i; for(i=a>b?a:b;i<=a*b;i++) { if (i%a==0&&i%b==0) { break; } } return i; } public static void main(String[] args) { Scanner scanner=new Scanner ( System.in ); int a=scanner.nextInt (); int b=scanner.nextInt (); System.out.println(Min(a,b)); System.out.println(Max(a,b)); } }第六题:手机以及固话号码正则表达式(暂定)
package kaoshi; import java.util.regex.Matcher; import java.util.regex.Pattern; public class PatternAndMatcher { public static void main(String[] args) { Pattern p1=null; Matcher m=null; String phonenum="17249231180 17369237180xxd1736-00092371801236-01202237180"; p1=Pattern.compile("([1][0-9]{10})|([0-9]{4}-[0-9]{10})"); m=p1.matcher(phonenum); while(m.find()) { //System.out.println(1); System.out.println(m.group()); } //System.out.println(1); } }
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