按照題目要求編寫的用javaBean規(guī)范設(shè)計(jì)的學(xué)生類Student的Java程序如下
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需要?jiǎng)?chuàng)建user.java.test包,把Student.java文件和Test.java文件放入包中,編譯Student.java文件并且編譯運(yùn)行Test.java文件得到運(yùn)行結(jié)果
Student.java文件代碼如下
package user.java.test;
import java.io.Serializable;
public class Student implements Serializable{
private static final long serialVersionUID = 1L;
private String no;
private String name;
private double score;
public Student(){}
public Student(String no,String name,double score){
this.no=no;
this.name=name;
this.score=score;
}
public String getNo(){ return no;}
public void setNo(String no){ this.no=no;}
public String getName(){ return name;}
public void setName(String name){ this.name=name;}
public double getScore(){ return score;}
public void setScore(double score){ this.score=score;}
public String toString(){
return "學(xué)號(hào):"+no+",姓名:"+name+",成績(jī):"+score;
}
public static double getAvg(Student[] sArray){
double sum=0,avg;
for(int i=0;isArray.length;i++){
sum=sum+sArray[i].getScore();
}
avg=sum/sArray.length;
return avg;
}
}
Test.java文件代碼如下
package user.java.test;
public class Test{
public static void main(String[] args){
Student[] sArray=new Student[5];
sArray[0]=new Student("001","張三",89.5);
sArray[1]=new Student("002","李四",82.5);
sArray[2]=new Student("003","王五",93);
sArray[3]=new Student("004","趙六",73.5);
sArray[4]=new Student("005","孫七",66);
System.out.println("這些學(xué)生的平均分:"+Student.getAvg(sArray));
for(int i=0;isArray.length;i++){
System.out.println(sArray[i].toString());
}
}
}
//都是從新手過來的,以下代碼供參考
//1.
public?class?BankAccount?{
private?static?String?acctnum;
private?static?double?money;
private?static?void?showAcct()?{
System.out.println("賬號(hào)為:?"?+?acctnum);
}
private?static?void?showMoney()?{
System.out.println("余額為:?"?+?money);
}
public?BankAccount(String?acc,?double?m)?{
this.acctnum?=?acc;
this.money?=?m;
}
public?static?void?main(String[]?args)?{
BankAccount?ba?=?new?BankAccount("626600018888",?5000.00);
ba.showAcct();
ba.showMoney();
}
}
//2.
public?class?Triangle?{
private?static?float?a;
private?static?float?b;
private?static?float?c;
public?Triangle(float?a,?float?b,?float?c)?{
this.a?=?a;
this.b?=?b;
this.c?=?c;
}
public?static?boolean?judgeTriangle(float?a,?float?b,?float?c)?{
if?((a??Math.abs(b?-?c)??a??b?+?c)
?(b??Math.abs(a?-?c)??b??a?+?c)
?(c??Math.abs(a?-?b)??c??a?+?b))
return?true;
else
return?false;
}
public?float?getCircumference()?{
return?this.a?+?this.b?+?this.c;
}
}
//3.
public?class?TestTriangle?{
public?static?void?main(String[]?args)?{
Triangle?t?=?new?Triangle(5.3f,7.8f,9.3f);
if(t.judgeTriangle(5.3f,7.8f,9.3f)){
System.out.print("能夠成三角形,周長(zhǎng)為:?");
System.out.printf("%9.2f",t.getCircumference());}
else
System.out.println("不能構(gòu)成三角形");
}
}
最簡(jiǎn)單的java代碼肯定就是這個(gè)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(xué)java的新手看的第一個(gè)代碼了。如果是零基礎(chǔ)的新手朋友們可以來我們的java實(shí)驗(yàn)班試聽,有免費(fèi)的試聽課程幫助學(xué)習(xí)java必備基礎(chǔ)知識(shí),有助教老師為零基礎(chǔ)的人提供個(gè)人學(xué)習(xí)方案,學(xué)習(xí)完成后有考評(píng)團(tuán)進(jìn)行專業(yè)測(cè)試,幫助測(cè)評(píng)學(xué)員是否適合繼續(xù)學(xué)習(xí)java,15天內(nèi)免費(fèi)幫助來報(bào)名體驗(yàn)實(shí)驗(yàn)班的新手快速入門java,更好的學(xué)習(xí)java!
import?java.util.Scanner;
import?demo.ui.MainShell;
import?demo.ui.PublicStatic;
public?class?DemoApp?{
public?static?int?getScanner()?{
int?input?=?0;
try?{
Scanner?scanner?=?new?Scanner(System.in);
input?=?scanner.nextInt();
}?catch?(Exception?e)?{
System.out.println("\t\t請(qǐng)重新輸入");
return?getScanner();
}
return?input;
}
public?static?void?main(String[]?args)?{
System.out.println("\t\t\t歡迎使用系統(tǒng)");
System.out.println("\t\t***********************");
System.out.println("\t\t\t1、客戶信息管理");
System.out.println("\t\t\t2、購(gòu)物結(jié)算");
System.out.println("\t\t\t3、真情回饋");
System.out.println("\t\t\t4、注銷");
System.out.println("\t\t***********************");
while(true)?{
int?input?=?getScanner();
switch?(input)?{
case?1:
System.out.println("\t\t\t1、客戶信息管理");
break;
case?2:
System.out.println("\t\t\t2、購(gòu)物結(jié)算");
break;
case?3:
System.out.println("\t\t\t3、真情回饋");
break;
case?4:
System.out.println("\t\t\t4、注銷");
break;
default:
System.out.println("\t\t請(qǐng)重新輸入");
break;
}
if(input?==?4)?{
break;
}
}
}
}
public class test1 {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("請(qǐng)輸入本月稅前工資");
double d = scan.nextDouble(); //稅前工資
double sal= d - 3500; // 減去扣除數(shù)的
double salary = 0; //初始化工資
if(sal=1500){
salary = sal*0.03;
}else if(sal=4500){
salary = sal*0.1-105;
}else if(sal=9000){
salary = sal*0.2-555;
}else if(sal=35000){
salary = sal*0.25-1005;
}else if(sal=55000){
salary = sal*0.3-2755;
}else if(sal=80000){
salary = sal*0.35-5505;
}else{
salary = sal*0.45-13505;
}
System.out.println("個(gè)人所得稅的繳納額度為:"+salary+"元");
}
}
盡量簡(jiǎn)化邏輯 像錢的多少 先用變量存儲(chǔ)起來 再帶入就好了
盡量簡(jiǎn)化代碼? 像輸出也只用一句然后帶入就好了
盡量自己考慮 每一點(diǎn)問題都是自己敲代碼的過程中產(chǎn)生然后明白的
這題是我原題? 我知道你在哪? 既然在那了 為什么還不努力呢
public class Compute{
public static void main(String args [])
{
int a = 2;
float b = 2;
double c = 2;
Compute com1 = new Compute();
System.out.println(com1.mySqr(a));
System.out.println(com1.mySqr(b));
System.out.println(com1.mySqr(c));
}
public int mySqr(int x)
{
int value = x*x;
return value;
}
public float mySqr(float x)
{
float value = x*x;
return value;
}
public double mySqr(double x)
{
double value = x*x;
return value;
}
}
本文題目:java開發(fā)完整代碼,完整的java代碼
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