How to shorten code in Java/Android?

Question

Is there any way to shorten this declaration code?

boolean installed1 = false;
boolean installed2 = false;
boolean installed3 = false;
boolean installed4 = false;

...etc

Answer 1

Yes.Use array OR ArrayList<Boolean>

boolean installed[] = {false,false,false,false};
//Access it by index i.e installed[0] 

OR

You just want to decrease the code and it's class level declaration, as default value for boolean is false

boolean installed1,installed2,installed3,installed4;

If it's local declaration,

boolean installed1,installed2,installed3,installed4;
installed1=installed2=installed3=installed4=false;

Answer 2

这似乎是最短的方式：

boolean installed[] = new boolean[4];