string - changing if/else-statements within gui components in java -


if had jtextarea or that, possible send string variable source code changes conditions of if-statement?

this source code:

if(condition1 + operation + condition2){   // }

and in gui had 3 textareas:

[condition1]: "array[i]"  or "(array[i]+array[i+1])/2"   // ever [operator]:   "<"           // or >, !=, etc [condition2]: "array[i-1]"

thank suggestions

it seems want evaluate string if source code. not, approach (apart being potentially insecure) won't work. map conditions , operands enum :

public static enum econdition {     eq,ne,lt,gt,le,ge } public static enum evariables {     my_array, my_other_var }  public void eval(econdition mycondition, evariables myvar, string myindex) {     ...      if(myvar.equals(evariables.my_array)) {         dosometingtomyarrayatindex(mycondition,integer.parseint(myindex), object /* whatever type is*/ myreferencevalue);     } else if(myvar.equals(evariables.my_other_var)) {         dosometingtomyothervar(mycondition);     } }  public void dosometingtomyarrayatindex(econdition cond, integer index, object myreferencevalue) {     boolean isconditiontrue = false;     switch(cond) {         case eq:             isconditiontrue = (myarray[index] == myreferencevalue);             break;         case ne:             isconditiontrue = (myarray[index] != myreferencevalue);             break;       // ... , on     } }

the other approach use code parser, wouldn't recommend that. apart security, think overkill. but, if want explore parser approach, take @ : https://github.com/javaparser/javaparser


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