Tip calc

package com.example.jdsch_000.testing;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;


public class MainActivity extends Activity {

    EditText billAmount =(EditText) findViewById(R.id.billAmount);
    EditText tip1Field = (EditText) findViewById(R.id.tip1);
    EditText tip2Field = (EditText) findViewById(R.id.tip2);
    EditText tip3Field = (EditText) findViewById(R.id.tip3);

    EditText comp1 = (EditText) findViewById(R.id.comp1);
    EditText comp2 = (EditText) findViewById(R.id.comp2);
    EditText comp3 = (EditText) findViewById(R.id.comp3);





    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);

        Button okBtn = (Button) findViewById(R.id.okBtn);
        Button resetBtn = (Button) findViewById(R.id.resetBtn);


        okBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               tip tip1 =  new tip(Double.parseDouble(billAmount.toString()), Double.parseDouble(tip1Field.toString()));
                tip tip2 =  new tip(Double.parseDouble(billAmount.toString()), Double.parseDouble(tip2Field.toString()));
                tip tip3 =  new tip(Double.parseDouble(billAmount.toString()), Double.parseDouble(tip3Field.toString()));

                comp1.setText(String.format(".2f", tip1.calculateTip()));
                comp2.setText(String.format(".2f", tip2.calculateTip()));
                comp3.setText(String.format(".2f", tip3.calculateTip()));

            }
        });







        return true;
    }



    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}




package com.example.jdsch_000.testing;

/**
 * Created by jdsch_000 on 11/20/2014.
 */
public class tip {
    private double billAmount;
    private double rate;



    public tip(double v){
        billAmount = 0;
    }

    public tip(double billAmount, double rate){
        this.rate = rate / 100;
        this.billAmount = billAmount;
    }

    public double calculateTip(){
        double total = rate * billAmount;


        return total;
    }
}