import java.util.ArrayList;
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import java.util.List;
import java.util.Scanner;
public class GradeStatistic {
public static void main(String[] args) {
GradeStatistic gs = new GradeStatistic();
ListMark list = new ArrayListMark();
float sum = 0;
while(true){
Scanner sc = new Scanner(System.in);
System.out.print("Please input student name: ");
String name = sc.nextLine();
if(name.equals("end")){
break;
}
System.out.print("Please input student score: ");
float score = sc.nextFloat();
sum += score;
list.add(gs.new Mark(name, score));
}
float max = list.get(0).getScore();
float min = list.get(0).getScore();
for(Mark mark: list){
if(max mark.getScore()){
max = mark.getScore();
}
if(min mark.getScore()){
min = mark.getScore();
}
}
float average = sum / list.size();
System.out.println("Average is: " + average);
System.out.println("Max is: " + max);
System.out.println("Min is: " + min);
}
private class Mark{
private String name;
private float score;
public Mark(String name, float score){
this.name = name;
this.score = score;
}
public String getName() {
return name;
}
public float getScore() {
return score;
}
}
}
----------------------
Please input student name: Zhang san
Please input student score: 100
Please input student name: Li Si
Please input student score: 91
Please input student name: Ec
Please input student score: 35
Please input student name: ma qi
Please input student score: 67
Please input student name: end
Average is: 73.25
Max is: 100.0
Min is: 35.0
你是青鳥的吧?這我寫過?有源碼?這里怎么上傳壓縮包啊
package?ghhh;
import?java.util.Scanner;
public?class?DvD?{
public?static?void?main(String[]?args)?{
int?state[]=new??int[6];
String?name[]=new??String[6];
int?date[]=new?int[6];
int?count[]=new?int?[6];
name[0]="權(quán)利的游戲";
name[1]="命運之夜";
name[2]="傲慢與偏見";
state[0]=1;
state[1]=0;
state[2]=1;
date[0]=13;
date[1]=0;
date[2]=9;
count[0]=23;
count[1]=23;
count[2]=23;
int?n;
// boolean?n=false;
do{
System.out.println("歡迎使用迷你DVD管理器");
System.out.println("1.新增DVD");
System.out.println("2.查看DVD");
System.out.println("3.刪除DVD");
System.out.println("4.借出DVD");
System.out.println("5.歸還DVD");
System.out.println("6.退出DVD");
Scanner?input?=new?Scanner(System.in);
System.out.println("請選擇：");
?n=input.nextInt();
switch(n){
case?1:
System.out.println("請輸入要增加DVD的名稱：");
String?name1=input.next();
boolean?flag=false;
for(int?i=0;iname.length;i++){
if(name[i]==null){
name[i]=name1;
flag=true;
break;
}
}
if(flag){
System.out.println("新增DVD"+name1+"成功");
}else{
System.out.println("貨架已滿！增加失??！");
}
System.out.println("請輸入0返回！");
n=input.nextInt();
break;
case?2:
System.out.println("序號\t"+"狀態(tài)\t"+"名稱\t\t"+"借出日期\t"+"借出次數(shù)");
for(int?i=0;iname.length;i++){
if(name[i]!=null){
String?state1?=((state[i]==0)?"可借":"已借");
String?date1=((date[i]==0)?"":date[i]+"日");
String?count1=count[i]+"次";
System.out.println((i+1)+"\t"+state1+"\t"+name[i]+"\t"+date1+"\t\t"+count1);
}
}
System.out.println("請輸入0返回！");
n=input.nextInt();
break;
case?3:
System.out.println("請輸入要刪除的DVD名稱：");
String?name2=input.next();
int?index=-1;
boolean?a=false;
boolean?flag1=false;
for(int?i=0;iname.length;i++){
if(name2.equals(name[i])state[i]==1){
System.out.println("此DVD已經(jīng)借出，無法刪除");
a=true;
break;
}else?if(name2.equals(name[i])state[i]==0){
a=true;
index=i;
flag1=true;
System.out.println("刪除成功！");
break;
}
}
if(a==false){
System.out.println("沒有找到相同名稱的DVD！");
}
if(flag1){
for?(int?i=index;iname.length;i++){
if(i!=name.length-1){
name[i]=name[i+1];
state[i]=state[i+1];
date[i]=date[i+1];
count[i]=count[i+1];
}
name[name.length-1]=null;
state[name.length-1]=0;
date[name.length-1]=0;
count[name.length-1]=0;
}
}
System.out.println("請輸入0返回！");
n=input.nextInt();
break;
case?4:
System.out.println("請輸入要借出的DVD：");
?String?name3=input.next();
?boolean?a3=false;
?boolean?b3=false;
?for(int?i=0;iname.length;i++){
?if(name3.equals(name[i])??state[i]==1){
?System.out.println("該DVD已經(jīng)借出");
?a3=true;
?}else?if(name3.equals(name[i])??state[i]==0){
?do{
?System.out.println("請輸入借出的日期：");
int?m=input.nextInt();
?
?if(m31||m1){
?System.out.println("請重新輸入日期：");
?b3=true;
?}else{
?date[i]=m;?
?state[i]=1;
?count[i]+=1;
?}
?
?}while(b3==true);
?System.out.println("借出成功！");
?a3=true;
?}
?}
?if(a3==false){
?System.out.println("沒有該DVD");
?}
?System.out.println("請輸入0返回！");
?n=input.nextInt();
break;
case?5:
System.out.println("請輸入要歸還的DVD：");
String?name5=input.next();
boolean?b5=false;
boolean?m5=false;
for(int?i=0;iname.length;i++){
if(name5.equals(name[i])??state[i]==1){
b5=true;
do{
System.out.println("請輸入要歸還DVD的日期：（歸還日期請輸入當月日期?1~31）");
int?a5=input.nextInt();
if(a531){
System.out.println("請重新輸入日期：");
m5=true;
}else?if(a5date[i]){
System.out.println("借出日期是"+date[i]+"日\t輸入的日期不能小于借出的日期,請重新輸入日期：");
m5=true;
}else{
state[i]=0;
System.out.println("歸還成功");
System.out.println("借出日期是："+date[i]+"歸還日期是："+a5+"日\t租金一天一元：共"+(a5-date[i])+"元");
???date[i]=0;
???m5=false;
}
}while(m5==true);
}else?if?(name5.equals(name[i])??state[i]==0){
System.out.println("該DVD未借出，不可歸還！");
b5=true;
}
}
if(b5==false){
System.out.println("沒有該名稱的DVDV");
}
System.out.println("請輸入0返回！");
?n=input.nextInt();
break;
case?6:
n=1;
System.out.println("程序退出！");
break;
default:
if(n==0){
}else{
System.out.println("輸入錯誤！請重新輸入！");
n=0;
}
break;
}
}while(n==0);
System.out.println("謝謝使用！");
}
}
看看有沒有問題 好久之前的了
最簡單的java代碼肯定就是這個了，如下：
public class MyFirstApp
{
public static void main(String[] args)
{
System.out.print("Hello world");
}
}
“hello world”就是應(yīng)該是所有學java的新手看的第一個代碼了。如果是零基礎(chǔ)的新手朋友們可以來我們的java實驗班試聽，有免費的試聽課程幫助學習java必備基礎(chǔ)知識，有助教老師為零基礎(chǔ)的人提供個人學習方案，學習完成后有考評團進行專業(yè)測試，幫助測評學員是否適合繼續(xù)學習java，15天內(nèi)免費幫助來報名體驗實驗班的新手快速入門java，更好的學習java！
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