java - pass integer array from one class to another -

i having 2 classes. trying plot graph database values not able send value 1 class another, array being used. please go through code , me out.

following class values of array present(right using static values)

import java.util.arraylist; import java.util.hashmap; import java.util.list; import java.util.map; import org.achartengine.chartdemo.demo.chart.idemochart; import org.achartengine.chartdemo.demo.chart.temperaturechart; import android.app.listactivity; import android.content.intent; import android.os.bundle; import android.util.log; import android.view.view; import android.widget.listview; import android.widget.simpleadapter;  public class chartdemo extends listactivity {     double = 10;     double pass[] = { 7, 0, 4, 8, 3, 5, 7, 6, 8, 19, 11, 4 };     intent intent;     private idemochart[] mcharts = new idemochart[] { new temperaturechart() };      private string[] mmenutext;      private string[] mmenusummary;      /** called when activity first created. */     @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         int length = mcharts.length;         mmenutext = new string[length];         mmenusummary = new string[length];          temperaturechart obj=new temperaturechart();         obj.getarray(pass);         for(int i=0;i<pass.length;i++)         {             log.i("sanket",pass[i]+"");         }          (int = 0; < length; i++) {             mmenutext[i] = mcharts[i].getname();             mmenusummary[i] = mcharts[i].getdesc();         }         setlistadapter(new simpleadapter(this, getlistvalues(),                 android.r.layout.simple_list_item_2, new string[] {                         idemochart.name, idemochart.desc }, new int[] {                         android.r.id.text1, android.r.id.text2 }));     }      private list<map<string, string>> getlistvalues() {         list<map<string, string>> values = new arraylist<map<string, string>>();         int length = mmenutext.length;         (int = 0; < length; i++) {             map<string, string> v = new hashmap<string, string>();             v.put(idemochart.name, mmenutext[i]);             v.put(idemochart.desc, mmenusummary[i]);             values.add(v);         }         return values;     }      @override     protected void onlistitemclick(listview l, view v, int position, long id) {         super.onlistitemclick(l, v, position, id);          // intent = new intent(this, temperaturechart.class);          // if (position <= mcharts.length + 1) {          intent = mcharts[position].execute(this);          // intent.putextra("sam", a);         // log.i("sanket",a+"");          // }          startactivity(intent);     } } 

now second class want array values problem class being initialized before filling items in array array in class empty

package org.achartengine.chartdemo.demo.chart;  import org.achartengine.chartfactory; import org.achartengine.chart.barchart.type; import org.achartengine.model.rangecategoryseries; import org.achartengine.model.xymultipleseriesdataset; import org.achartengine.renderer.simpleseriesrenderer; import org.achartengine.renderer.xymultipleseriesrenderer;  import android.content.context; import android.content.intent; import android.graphics.color; import android.graphics.paint.align; import android.util.log;  /**  * temperature demo range chart.  */ public class temperaturechart implements idemochart {     // static double b;      double[] maxvalues;      public void getarray(double array1[]) {          array1 = new double[12];         this.maxvalues = array1;          for(int i=0;i<array1.length;i++)         {             log.i("sanket",maxvalues[i]+"");         }     }       /**      * returns chart name.      *       * @return chart name      */     public string getname() {         return "marks range chart";     }      /**      * returns chart description.      *       * @return chart description      */     public string getdesc() {         return "the monthly marks (vertical range chart)";     }      /**      * executes chart demo.      *       * @param context      *            context      * @return built intent      */     public intent execute(context context) {              // b = getintent().getintextra("sam", 0);         // log.i("sanket",b+"");         double[] minvalues = new double[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };         // double[] maxvalues = new double[] { 7, 0, 4, 8, 3, 5, 7, 6, 8, 19,         // 11,         // 4 };          xymultipleseriesdataset dataset = new xymultipleseriesdataset();         rangecategoryseries series = new rangecategoryseries("marks");         int length = minvalues.length;         (int k = 0; k < length; k++) {             series.add(minvalues[k], maxvalues[k]);         }         dataset.addseries(series.toxyseries());         int[] colors = new int[] { color.cyan };         xymultipleseriesrenderer renderer = buildbarrenderer(colors);         setchartsettings(renderer, "monthly marks range", "month",                 "marks obtained", 0.5, 12.5, 0, 20, color.gray, color.ltgray);         renderer.setbarspacing(0.5);         renderer.setxlabels(0);         renderer.setylabels(10);         renderer.addxtextlabel(1, "jan");         renderer.addxtextlabel(3, "mar");         renderer.addxtextlabel(5, "may");         renderer.addxtextlabel(7, "jul");         renderer.addxtextlabel(10, "oct");         renderer.addxtextlabel(12, "dec");         renderer.addytextlabel(5, "ok");         renderer.addytextlabel(10, "good");         renderer.addytextlabel(20, "nice");         renderer.setmargins(new int[] { 30, 70, 10, 0 });         renderer.setylabelsalign(align.right);         simpleseriesrenderer r = renderer.getseriesrendererat(0);         r.setdisplaychartvalues(true);         r.setchartvaluestextsize(12);         r.setchartvaluesspacing(3);         r.setgradientenabled(true);         r.setgradientstart(-20, color.blue);         r.setgradientstop(20, color.green);         return chartfactory.getrangebarchartintent(context, dataset, renderer,                 type.default, "marks range");     }      protected void setchartsettings(xymultipleseriesrenderer renderer,             string title, string xtitle, string ytitle, double xmin,             double xmax, double ymin, double ymax, int axescolor,             int labelscolor) {         renderer.setcharttitle(title);         renderer.setxtitle(xtitle);         renderer.setytitle(ytitle);         renderer.setxaxismin(xmin);         renderer.setxaxismax(xmax);         renderer.setyaxismin(ymin);         renderer.setyaxismax(ymax);         renderer.setaxescolor(axescolor);         renderer.setlabelscolor(labelscolor);     }      protected xymultipleseriesrenderer buildbarrenderer(int[] colors) {         xymultipleseriesrenderer renderer = new xymultipleseriesrenderer();         renderer.setaxistitletextsize(16);         renderer.setcharttitletextsize(20);         renderer.setlabelstextsize(15);         renderer.setlegendtextsize(15);         int length = colors.length;         (int = 0; < length; i++) {             simpleseriesrenderer r = new simpleseriesrenderer();             r.setcolor(colors[i]);             renderer.addseriesrenderer(r);         }         return renderer;     } } 

don't know doing here:

public void getarray(double array1[]) {      array1 = new double[12];     this.maxvalues = array1;      for(int i=0;i<array1.length;i++)     {         log.i("sanket",maxvalues[i]+"");     } } 

you overwriting input param array1 new double[12] , therefore this.maxvalues.