How to select an input from a set of inputs?

**r035198x** · Feb 1 '07, 04:24 AM

Originally posted by 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.prin tln("if-1: True");
if(a<3) {
System.out.prin tln("if-2: True"); }
else {System.out.pri ntln("if-2: False"); }
System.out.prin tln("a:" +a); }
else {
System.out.prin tln("if-1: False");
if(a<8)
{
System.out.prin tln("if-3: True"); }
else {
System.out.prin tln("if-3: False"); }
System.out.prin tln("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** · Feb 1 '07, 07:03 AM

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 :

Code:

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

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

Code:

 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** · Feb 1 '07, 09:00 AM

May be this code will help you :

Code:

 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

Code:

 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** · Feb 1 '07, 09:13 AM

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

Code:

     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** · Feb 1 '07, 01:57 PM

How about

Code:

 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

Code:

 something(1);

and for any other entry in your array using

Code:

 something(array[index]);

Will this work for you?

**shana07** · Feb 1 '07, 09:38 PM

May be this code will help you :

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

**shana07** · Feb 1 '07, 09:40 PM

Originally posted by horace1

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** · Feb 1 '07, 09:50 PM

Originally posted by r035198x

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** · Feb 1 '07, 10:19 PM

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

Code:

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.

Code:

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** · Feb 2 '07, 04:41 AM

Originally posted by shana07

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

Code:

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.

Code:

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:

Code:

 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** · Feb 2 '07, 05:05 AM

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?

Code:

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** · Feb 2 '07, 05:24 AM

Originally posted by 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?

Code:

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** · Feb 2 '07, 08:38 AM

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)

Code:

 public static void main (String[] args)

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

Code:

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.

Code:

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** · Feb 2 '07, 12:41 PM

Originally posted by 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)

Code:

 public static void main (String[] args)

Class - TestDriver

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

Code:

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.

Code:

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.

How to select an input from a set of inputs?

How to select an input from a set of inputs?

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment