How to select an input from a set of inputs?

[shana07]

Hi All,
I do really need to consult you guys about my java assignment.
Please guide me how to make an algorithm to select an input from a set of inputs?

Suppose I have a program p (a), an input a=1, a set of inputs = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. This is the program:

int a=1
if(a<5) {
System.out.println("if-1: True");
if(a<3) {
System.out.println("if-2: True"); }
else {System.out.println("if-2: False"); }
System.out.println("a:" +a); }
else {
System.out.println("if-1: False");
if(a<8)
{
System.out.println("if-3: True"); }
else {
System.out.println("if-3: False"); }
System.out.println("a:" +a); }

How am I supposed to do?
Anything to do with set those inputs is stored in a file and the program first read the file to get all candidates into a list?

Note: Because later I need to select an input from the set to force a different branch of execution.

Thanks guys....

[r035198x]

Hi All,
I do really need to consult you guys about my java assignment.
Please guide me how to make an algorithm to select an input from a set of inputs?

Suppose I have a program p (a), an input a=1, a set of inputs = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. This is the program:

int a=1
if(a<5) {
System.out.println("if-1: True");
if(a<3) {
System.out.println("if-2: True"); }
else {System.out.println("if-2: False"); }
System.out.println("a:" +a); }
else {
System.out.println("if-1: False");
if(a<8)
{
System.out.println("if-3: True"); }
else {
System.out.println("if-3: False"); }
System.out.println("a:" +a); }

How am I supposed to do?
Anything to do with set those inputs is stored in a file and the program first read the file to get all candidates into a list?

Note: Because later I need to select an input from the set to force a different branch of execution.

Thanks guys....

Try explaining again and if you need to post code, please do so using code tags.

[shana07]

Ops sorry mode...
Let me explain again my problem.

Let say I have a test driver - TestDriver.java which stores and a set of test inputs such this :

int input[ ] = {1, 2, 3, 4, 5, 6, 7, 8, 9};

The TestDriver suppose to run a program under test - MyProgram.java.

 int a=1;                 
 if(a<5)
  { 
    System.out.println("if-1: True");
  if(a<3) {
      System.out.println("if-2: True");
            }                  
  else {
         System.out.println("if-2: False");
         }
      System.out.println("a:" +a);         
}   
   else 
    {
      System.out.println("if-1: False");
     if(a<8)
     {
       System.out.println("if-3: True");
     }
  else {
          System.out.println("if-3: False");
 }                  
System.out.println("a:" +a);
}
 

First I run the program using int a = 1; until finish execution.
Then I want TestDriver to pass other int value (from input[ ]) to MyProgram and same until finish execution.

My questions here are:
1. How am I suppose to pass other int values to MyProgram after finish the first execution?
2. Is there anything to do with serialization - write and read those set of inputs?

Please advise..Many thanks

beginner to java,
Shana

[hirak1984]

May be this code will help you :

 public class A1 {
public static void main(String args[])
{
A2 newA2=new A2();
 int a[]={1,2,3,4,5,6,7,8,9};
int i=a.length;
for(int j=0;j<i;j++)
 newA2.PrintA(a[j]);
}
}
 

then the second class

 public class A2 {
public void PrintA (int a)
{
 if(a<5)
   { 
     System.out.println("if-1: True");
   if(a<3) {
    System.out.println("if-2: True");
             }         
   else {
          System.out.println("if-2: False");
          }
       System.out.println("a:" +a);   
 }   
    else 
     {
       System.out.println("if-1: False");
      if(a<8)
      {
        System.out.println("if-3: True");
      }
   else {
           System.out.println("if-3: False");
  }      
 System.out.println("a:" +a);
 }
}
}
 

[horace1]

are these seperate programs ? if so you could pass the parameter a as via the main() parameter list, e.g.

     int a=1;          // value to pass to MyProgram
     // get runtime environment and execute child process
     Runtime systemShell = Runtime.getRuntime();
     Process output = systemShell.exec("java MyProgram " + a);
 

[r035198x]

How about

 void something(int x) { 
int a=x;     
if(a<5)
  { 
    System.out.println("if-1: True");
  if(a<3) {
  System.out.println("if-2: True");
            }       
  else {
         System.out.println("if-2: False");
         }
      System.out.println("a:" +a); 
}   
   else 
    {
      System.out.println("if-1: False");
     if(a<8)
     {
       System.out.println("if-3: True");
     }
  else {
          System.out.println("if-3: False");
}   
System.out.println("a:" +a);
}
}
 

Now since all this is now in a method, you can now call the method with any argument you want starting 1 as

 something(1);

and for any other entry in your array using

 something(array[index]);

Will this work for you?

[shana07]

May be this code will help you :

Yes, it really helps. Many thanks bro...

[shana07]

are these seperate programs ? if so you could pass the parameter a as via the main() parameter list, e.g.

Yes it is separate program..also could but I prefer simpler ..
Thanks to you.

[shana07]

How about
Now since all this is now in a method, you can now call the method with any argument you want starting 1 as
Will this work for you?

It works great. thank you.
At this moment I chose this sample code because my intention here is to pass an int value at a time and monitor the execution until finish (something to do with testing).
And the first sample code given above also useful for me....shall use it then.

Thanks

~Cheers~
Shana

[shana07]

Okay. I have a question to be asked here.
MyProgram file now also NEED 'main'

public static void main (String[] args) 

.

My TestDriver file is also having 'main'. How should I put this method in?
This method is from the third sample code above.

public void something(int x) 
 { 
    int a=x; 
 
    if(a<5)
    { 
        System.out.println("if-1: True");
      if(a<3) {
      System.out.println("if-2: True");
                }       
      else {
             System.out.println("if-2: False");
             }
          System.out.println("a:" +a); 
    }   
   else 
    {
      System.out.println("if-1: False");
     if(a<8)
     {
       System.out.println("if-3: True");
     }
  else {
          System.out.println("if-3: False");
    }   
    System.out.println("a:" +a);
    }
  }
 

[r035198x]

Okay. I have a question to be asked here.
MyProgram file now also NEED 'main'

public static void main (String[] args) 

.

My TestDriver file is also having 'main'. How should I put this method in?
This method is from the third sample code above.

public void something(int x) 
{ 
    int a=x; 
 
    if(a<5)
    { 
        System.out.println("if-1: True");
     if(a<3) {
     System.out.println("if-2: True");
                }      
     else {
             System.out.println("if-2: False");
             }
         System.out.println("a:" +a); 
    } 
else 
    {
     System.out.println("if-1: False");
     if(a<8)
     {
     System.out.println("if-3: True");
     }
else {
         System.out.println("if-3: False");
    } 
    System.out.println("a:" +a);
    }
}
 

You could make it static and call it directly:

 public static void main(String[] args) { 
 int[] values = {1, 2, 3, 4};
something(values[1]);
}
public static void something(int x) 
{ 
    int a=x; 
 
    if(a<5)
    { 
        System.out.println("if-1: True");
     if(a<3) {
     System.out.println("if-2: True");
                }      
     else {
             System.out.println("if-2: False");
             }
         System.out.println("a:" +a); 
    } 
else 
    {
     System.out.println("if-1: False");
     if(a<8)
     {
     System.out.println("if-3: True");
     }
else {
         System.out.println("if-3: False");
    } 
    System.out.println("a:" +a);
    }
}
 

[shana07]

Meaning to say it isn't possible for me to pass int value from other file (TestDriver - is passing values to MyProgram to run the execution)
like what you wrote before when both classes do need main?

How about this?
class MyProgram
{    
 public static void main(String[] args) 
 {     
    MyProgram program = new MyProgram();
    program.something(1);    
}            
 public void something(int x) 
..........
 { 

But this is not passing int value from TestDriver...
herm...help please.

[r035198x]

Meaning to say it isn't possible for me to pass int value from other file (TestDriver - is passing values to MyProgram to run the execution)
like what you wrote before when both classes do need main?

How about this?
class MyProgram
{ 
public static void main(String[] args) 
{     
    MyProgram program = new MyProgram();
    program.something(1);    
}           
public void something(int x) 
..........
{ 

But this is not passing int value from TestDriver...
herm...help please.

Alright now let's have all the programs posted here and a description of what you want to do.

[shana07]

Thanks...Let say I have two classes - MyProgram & TestDriver now which these two files need main (something to do with testing tool requirement which need main in the program)

 public static void main (String[] args) 

Class - TestDriver
Function: To pass ‘int a’ to MyProgram one by one from an array.

public static void main (String[] args) 
  {
          MyProgram myprogram =new Program();
          myprogram.something(1);   
          .....}
 

Class – MyProgram
Function: fetch a value from the calling program. And this class as I mentioned also need main.

public static void main (String[] args) 
  {      
    /* here I don’t know what to put as it also needs main */
   }
void something(int x) 
{ 
int a=x;     
if(a<5)
  { 
    System.out.println("if-1: True");
  if(a<3) {
  System.out.println("if-2: True");
            }       
  else {
         System.out.println("if-2: False");
         }
      System.out.println("a:" +a); 
}   
   else 
    {
      System.out.println("if-1: False");
     if(a<8)
     {
       System.out.println("if-3: True");
     }
  else {
          System.out.println("if-3: False");
}   
System.out.println("a:" +a);
}
}
 

[r035198x]

Thanks...Let say I have two classes - MyProgram & TestDriver now which these two files need main (something to do with testing tool requirement which need main in the program)

 public static void main (String[] args) 

Class - TestDriver

Function: To pass ‘int a’ to MyProgram one by one from an array.

public static void main (String[] args) 
 
{
 
MyProgram myprogram =new Program();
 
myprogram.something(1); 
 
.....}
 
 

Class – MyProgram

Function: fetch a value from the calling program. And this class as I mentioned also need main.

public static void main (String[] args) 
 
{      
 
/* here I don’t know what to put as it also needs main */
 
}
 
void something(int x) 
 
{ 
 
int a=x;     
 
if(a<5)
 
{ 
 
    System.out.println(\"if-1: True\");
 
if(a<3) {
 
System.out.println(\"if-2: True\");
 
            }      
 
else {
 
         System.out.println(\"if-2: False\");
 
         }
 
     System.out.println(\"a:\" +a); 
 
} 
 
else 
 
    {
 
     System.out.println(\"if-1: False\");
 
     if(a<8)
 
     {
 
     System.out.println(\"if-3: True\");
 
     }
 
else {
 
         System.out.println(\"if-3: False\");
 
} 
 
System.out.println(\"a:\" +a);
 
}
 
}
 
 

Why do you have to use two classes? Put the main method and the something method in the same class. Only one main method is run.

[shana07]

Alright bro...Now I've understood. Meaning to say there is only one 'main' if involve two classes. Many thanks.

[shana07]

Allow me to continue additional Q in this topic..need someone to guide me please.

Firstly, the classes & methods used are still the same - TestDriver.java & MyProgram.java. TestDriver is passing int value 'a' to MyProgram. Because a testing tool that currently I'm using needs TestDriver & MyProgram to have 'main' . How if I set an array of 'int a' stored in a file? Back to my first post - anything to do with serialization?

e.g.
First TestDriver pass int a=1 to MyProgram and do some testing stuff here. Then I need to select an int a (other) from the file (which doing by TestDriver) to run MyProgram...

       int[] values = {1, 2, 3, 4};
    something(values[1]);

[r035198x]

Allow me to continue additional Q in this topic..need someone to guide me please.







Firstly, the classes & methods used are still the same - TestDriver.java & MyProgram.java. TestDriver is passing int value \\\'a\\\' to MyProgram. Because a testing tool that currently I\\\'m using needs TestDriver & MyProgram to have \\\'main\\\' . How if I set an array of \\\'int a\\\' stored in a file? Back to my first post - anything to do with serialization?







e.g.



First TestDriver pass int a=1 to MyProgram and do some testing stuff here. Then I need to select an int a (other) from the file (which doing by TestDriver) to run MyProgram...

 
 
 
int[] values = {1, 2, 3, 4};
 
 
 
    something(values[1]);

You can write the array to a file if you want but see if this will not work here.

 class A { 
 
 
 
int[] a = new int[20]; //class A contains an array that is required by class B
 
 
 
}
 
 

Then

 class B { 
 
 
 
int[] x;
 
 
 
B(A a) { //Pass an A to B
 
 
 
x = a.a;
 
 
 
} 
 
 
 
something(x[1]);//now use the array from A in B.
 
 

[shana07]

I've tried your suggestion as above. got error but let it be first...I'll inform again about it.
I have one Q here, I ran a program with an error:

class Mode has no static field {1

my code is:

class Program
{
 
 public static void main(String[] args) 
 {
     int a = TestDriver.getInt( 0, 4); //FETCHING FROM ONE CLASS
 
     if(a<5)
    { 
        System.out.println("if-1: True");
       ..........
 ......
 

What's that mean....
thank u