java - Android Text input always give me NaN value -


i can not figure out why code output show nan. there can me figure out did mistake?

package com.example.user.solar_calculator;  import android.app.activity; import android.os.bundle; import android.view.menu; import android.view.menuitem; import android.content.context; import android.content.intent;  import android.widget.button; import android.view.view; import android.view.view.onclicklistener; import android.widget.edittext; import android.widget.toast;  public class efficiency extends activity {     button button;     edittext efficiency;     edittext vol;      string e,v;      double e1,wat,v1, ac_load_in_ampere_hour_calculation,dc;     double load,load_vol,total_daily_load,lol;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_efficiency);         initcontrols();         addlisteneronbutton();     }      public void initcontrols() {         efficiency=(edittext)findviewbyid(r.id.edittext1);         vol=(edittext)findviewbyid(r.id.edittext2);         button=(button)findviewbyid(r.id.button);         button.setonclicklistener(new onclicklistener() {             @override             public void onclick(view v) {                 try {                     e1=double.parsedouble(efficiency.gettext().tostring()); // make use of autoboxing.  it's easier read.                 } catch (numberformatexception e) {                     e1=1;                 }                 try {                     v1=double.parsedouble(vol.gettext().tostring());// make use of autoboxing.  it's easier read.                 } catch (numberformatexception e) {                     v1=1;                 }                  bundle extras = getintent().getextras();                 if(extras !=null) {                     string value = extras.getstring("four");                     load=double.parsedouble(value.tostring());                 }                 wat=load_vol*(1+.1);                  ac_load_in_ampere_hour_calculation = (load)/( v1* (e1/100));                  total_daily_load=ac_load_in_ampere_hour_calculation+dc;                  intent = new intent(efficiency.this, calculation.class);                 //create bundle                 bundle bundle = new bundle();                 //add data bundle                  bundle.putstring("seven", string.valueof(ac_load_in_ampere_hour_calculation));                 bundle.putstring("eight", string.valueof(total_daily_load));                 bundle.putstring("nine", string.valueof(dc));                  //add bundle intent                 i.putextras(bundle);                 //fire second activity                 startactivity(i);             }         });     }      public void addlisteneronbutton() {             final context context = this;             button = (button) findviewbyid(r.id.button);         }      @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.menu_main, menu);         return true;     }      @override     public boolean onoptionsitemselected(menuitem item) {         // handle action bar item clicks here. action bar         // automatically handle clicks on home/up button, long         // specify parent activity in androidmanifest.xml.         int id = item.getitemid();          //noinspection simplifiableifstatement         if (id == r.id.action_settings) {             return true;         }          return super.onoptionsitemselected(item);     } }

i think line cause problem ac_load_in_ampere_hour_calculation = (load)/( v1* (e1/100));

because if v1 = 0 impossible.


Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more