Using && (Conditional-AND) in java List

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Hello everybody!

Im new in java and i have a question about using util.List.

I have 3 values need add to List so im use:

Java

List<Integer> i = new ArrayList<Integer>();

		i.add(140001119);
		i.add(140001106);
		i.add(140001108);

and conditional-AND:

Java

if (i.contains(140001119) && i.contains(140001106) && i.contains(140001108))
			System.out.println("match");

There is problem by using:

Java

if (i.contains(140001119) && i.contains(140001106) && i.contains(140001108))

and Console dont give me "match" words.

So my question is how to use AND with more than 1 value in List?

Thanks in advanced!

Posted 26-Jul-15 18:32pm

EADever

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CPallini 27-Jul-15 3:01am

Your code outputs 'match' on my Lubuntu box.

1 solution

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Patrice T · Accepted Answer · 2015-07-26T19:55:00

Solution 1

Advice: copy your condition outside of 'if', cut it in pieces and see what each piece is doing.
Assign pieces to dummy vars?
Some pieces will behave as expected and others will not.
When you that elements are Ok, start to put pieces together and continue to check.

Abuse of debugger.

dummy1= i.contains(140001119);
dummy2= i.contains(140001106);
...
dummy3= i.contains(140001119) && i.contains(140001106);
or
dummy3= dummt1 && dummy2;

Posted 26-Jul-15 19:55pm

Patrice T

Updated 26-Jul-15 21:15pm

v2

Comments

EADever 27-Jul-15 3:09am

Can you give a simple code?

Patrice T 27-Jul-15 3:15am

updated solution

EADever 27-Jul-15 3:19am

thanks for your solution! but i still need use if for check condition! :(

EADever 27-Jul-15 3:21am

thanks for your help!
im success with this code:
List<integer> i = new ArrayList<integer>();

i.add(140001119);
i.add(140001106);
i.add(140001108);

boolean a ;
boolean b;
boolean c;

a = i.contains(140001119);
b = i.contains(140001106);
c = i.contains(140001108);

if (a && b && c)
System.out.println("match");

result = match :) thanks brother

Patrice T 27-Jul-15 4:38am

if you are happy with the answer, you can 'accept' the answer and close the question.

you should also try your code with a,b,c as integers and see what is the result of i.contains(140001119) as integer. you can get a surprise there.
because if it works with boolean, and not in your initial code, it means that boolean changes something.

Patrice T 27-Jul-15 14:41pm

When your problem is solved, on CP, the usage is to close the question which say it is solved.
This way, it prevent other people from searching for something already solved.