java - Calculate the distance between two points -

i tried following code.but gives 2 errors.i want calculate distance between 2 points formula line , display result in textview1. not know did make mistake in code?

cal.java

    import android.view.view; import android.content.context; import java.lang.math;  public class cal extends view { cal(context context){     super(context); } public double result; double parameter = ((10-80)^2) + ((15-90)^2); public void cal(){     result = math.sqrt(parameter); } } 

mainactivity.java

import android.app.activity; import android.os.bundle; import android.widget.textview;  public class mainactivity extends activity{    cal cal;      textview textview;     public void oncreate(bundle s){         super.oncreate(s);  setcontentview(r.id.textview1);     cal = new cal(this);         textview.settext(cal).;     } } 

errors:

gradle: failure: build failed exception.

• what went wrong: execution failed task ':www:compiledebug'.

  compilation failed; see compiler error output details.

• try: run --stacktrace option stack trace. run --info or --debug option more log output.

and

could not execute build using gradle distribution 'http://services.gradle.org/distributions/gradle-1.6-bin.zip'.

import android.app.activity; import android.os.bundle; import android.widget.textview;  public class mainactivity extends activity{     cal cal;     textview textview;      public void oncreate(bundle s){     super.oncreate(s);     setcontentview(r.layout.<your layout name>);  // can not set id of view here     cal = new cal(this);  // object     cal.cal();     textview.settext(""+ cal.result);   // set value instead of view object     } }