如何从主方法JAVA测试我的程序
我是Java新手。我想测试计算器中可用的方法。什么是最有效的测试方法如何从主方法JAVA测试我的程序,java,testing,methods,main,main-method,Java,Testing,Methods,Main,Main Method,我是Java新手。我想测试计算器中可用的方法。什么是最有效的测试方法 package BeginnerLevel; import java.util.Scanner; public class Calculator { 这是构造器: public Calculator(){ while (true){ System.out.println("Personal Calculator\n"+ "Addition---> 1 \n"+"Subtraction
package BeginnerLevel;
import java.util.Scanner;
public class Calculator {
这是构造器:
public Calculator(){
while (true){
System.out.println("Personal Calculator\n"+
"Addition---> 1 \n"+"Subtraction---> 2\n"+"Multiplication---> 3\n"+"Division---> 4\n"+"Exit--->0");
Scanner input = new Scanner(System.in);
int UsrIn= input.nextInt();
input.close();
switch (UsrIn){
case 1:
Addition();
break;
case 2:
Subtraction();
break;
case 3:
Multiplication();
break;
case 4:
Division();
break;
case 0:
break;
}
}
}
这些是在开关情况下调用的方法
添加方法:
private void Addition(){
Scanner input= new Scanner(System.in);
double total=0;
double firstnum=0;
double secondnum=0;
System.out.println("Enter Fist number: ");
firstnum= input.nextDouble();
System.out.println("Enter Fist number: ");
secondnum=input.nextDouble();
input.close();
total= firstnum + secondnum;
System.out.println("The result of Addition for "+ firstnum +" + "+secondnum+" is "+total);
}
private void Subtraction(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first-second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
private void Multiplication(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first*second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
减法:
private void Addition(){
Scanner input= new Scanner(System.in);
double total=0;
double firstnum=0;
double secondnum=0;
System.out.println("Enter Fist number: ");
firstnum= input.nextDouble();
System.out.println("Enter Fist number: ");
secondnum=input.nextDouble();
input.close();
total= firstnum + secondnum;
System.out.println("The result of Addition for "+ firstnum +" + "+secondnum+" is "+total);
}
private void Subtraction(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first-second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
private void Multiplication(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first*second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
乘法方法:
private void Addition(){
Scanner input= new Scanner(System.in);
double total=0;
double firstnum=0;
double secondnum=0;
System.out.println("Enter Fist number: ");
firstnum= input.nextDouble();
System.out.println("Enter Fist number: ");
secondnum=input.nextDouble();
input.close();
total= firstnum + secondnum;
System.out.println("The result of Addition for "+ firstnum +" + "+secondnum+" is "+total);
}
private void Subtraction(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first-second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
private void Multiplication(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first*second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
划分方法:
private void Division(){
Scanner input= new Scanner(System.in);
double total=0;
double first=0;
double second=0;
System.out.println("Enter First number ");
first=input.nextDouble();
System.out.println("Enter Second number ");
second=input.nextDouble();
total= first*second;
System.out.println("The result of Addition for "+ first +" + "+second+" is "+total);
input.close();
}
}
欢迎推荐 您应该在程序中尝试Junit测试套件。
或者您可以使用调试模型来找出发生了什么 您的代码有很多错误。许多“错误”都与系统性测试的难度有关 在一个好的OO设计中,一个方法将执行一个任务,并且只执行一个任务。但您的方法混合了多个任务:
- 请求和读取参数
- 执行算术运算
- 打印结果
除了以上几点之外,还有几个错误可能会让你难受:
系统时需要非常小心。一旦它们被关闭,您将无法重新打开它们,或对它们进行读/写操作
您应该研究java中可用的测试类型,例如jUnit测试。显示您的代码没有帮助。“这是我的方法”并不是很有帮助