用java編寫小程序，已知a、b、c 3個(gè)隊(duì)伍進(jìn)行足球比賽，勝利3記分，平局1分，輸0分

importjava.util.Collections;
importjava.util.HashMap;
importjava.util.LinkedList;
importjava.util.List;
importjava.util.Map;
publicclassTest{
publicstaticvoidmain(String[]args){
finalString[]str={"a-b1:1","a-c2:1","b-c0:1"};

finalMapmap=newHashMap();
for(Strings:str){
finalString[]temp=s.split("");
finalString[]names=temp[0].split("-");
finalString[]counts=temp[1].split(":");
for(inti=0;i<2;i++){
Stringname=names[i];
intcount=Integer.parseInt(counts[i]);
if(map.containsKey(name)){
map.put(name,map.get(name)+count);
}else{
map.put(name,count);
}
}
}

finalListteams=newLinkedList();
for(Stringname:map.keySet()){
teams.add(newTeam(name,map.get(name)));
}
Collections.sort(teams);
System.out.println("隊(duì)伍:分");
for(Teamt:teams){
System.out.println(t.getName()+":"+t.getCount());
}
}
}
classTeamimplementsComparable{
privateStringname;
privateintcount;
publicTeam(Stringname,intcount){
this.name=name;
this.count=count;
}
publicvoidaddCount(intcount){
this.count=this.count+count;
}
publicStringgetName(){
returnname;
}
publicintgetCount(){
returncount;
}
publicintcompareTo(Teamo){
returno.getCount()-this.count;
}
}

用Java語言的LinkesList和集合寫個(gè)能夠自己輸入存儲(chǔ)商品名稱，數(shù)量，單價(jià)并計(jì)算價(jià)格價(jià)格是

importjava.util.ArrayList;
importjava.util.Scanner;
publicclassProduce{
	privateStringname;
	privateintcount;
	privateintprice;
	publicProduce(){
		super();
	}
	publicProduce(Stringname,intcount,intprice){
		super();
		this.name=name;
		this.count=count;
		this.price=price;
	}
	publicStringgetName(){
		returnname;
	}
	publicvoidsetName(Stringname){
		this.name=name;
	}
	publicintgetCount(){
		returncount;
	}
	publicvoidsetCount(intcount){
		this.count=count;
	}
	publicintgetPrice(){
		returnprice;
	}
	publicvoidsetPrice(intprice){
		this.price=price;
	}
	//輸入商品信息方法
	publicstaticArrayListInput(){
		Scannersc=newScanner(System.in);
		ArrayListal=newArrayList();
		Stringname;
		intcount,price;
		System.out.println("輸入商品名稱：");
		name=sc.nextLine();
		System.out.println("輸入商品數(shù)量：");
		count=sc.nextInt();
		System.out.println("輸入商品單價(jià)：");
		price=sc.nextInt();
		al.add(newProduce(name,count,price));
		System.out.println("添加商品成功");
		returnal;
	}
	//查看
	publicstaticvoidFind(Stringname,ArrayListal){
		for(Producep:al){
			if(name.equals(p.getName())){
				System.out.println("你要查看的商品是："+p.getName()+"數(shù)量是："
						+p.getCount()+"單價(jià)是："+p.getPrice()+"總價(jià)是："
						+(p.getCount()*p.getPrice()));
			}
		}
	}
	
	//刪除某個(gè)商品
	publicstaticvoidDel(Stringname,ArrayListal){
		for(inti=0;i			if(name.equals(al.get(i).getName())){
				System.out.println("刪除商品["+al.get(i).getName()+"]成功");
				al.remove(i);
				break;
			}
		}
	}
	publicstaticvoidmain(String[]args){
		ArrayListal=newArrayList();
		al=Input();//添加
		Scannersc=newScanner(System.in);
		System.out.println("輸入要查看的商品名：");
		Stringfname=sc.next();
		Find(fname,al);
		System.out.println("輸入要?jiǎng)h除的商品名：");
		Stringdname=sc.next();
		Del(dname,al);
	}
}

java畫直方圖，餅圖的源碼分析

我更改了一點(diǎn)，完善一點(diǎn)。希望你能理解 import javax.swing.*; import java.awt.*; public class Histogram extends JPanel { private int[] count;//方圖的數(shù)值 private int x = 50;//x坐標(biāo)為50 public Histogram(){ this.count = new int[]{0,0,0,0,0};//默認(rèn)count repaint(); } public Histogram(int[] count){ this.count = count;//傳入count repaint

c:foreach語句在JSP頁面獲取不到值，頁面只顯示EL表達(dá) 請(qǐng)高手幫忙解答一下，謝謝。

items="${cg}" 你把cg放到某個(gè)scope下。再在scope中讀出來。比如：pageContext.setAttribute("cg",cg); 然后：items="${pageScope.cg}"

VisualC# winform窗體應(yīng)用程序 語句加this有的怎么不加?

在Form1類內(nèi)部，所有的變量可以不加 this。默認(rèn)地，存取類內(nèi)部的變量時(shí)，都是 this。因此可以省略。但也有例外的情況，如下代碼所示

pubicpartialForm1:Form
{
privateintcount=0;//內(nèi)部私有變量

publicForm1(){……}//構(gòu)造函數(shù)

publicvoidSomeMethod(intcount)
{
this.count=count;//這里必須加上this.特指類內(nèi)部那個(gè)count變量
//如果省略this將產(chǎn)生編譯錯(cuò)誤
//count=count<---錯(cuò)誤的寫法
}
}