title: How can I remove the ".0" from a double? Android Studio
body: <p>I'm making a calculator for Android but I have a problem with the double. When I write a operation like 2+2 the result is 4.0 instead of 4 .
  How can I remove the ".0" from the result?
  This is my Activity:</p>
  
  <pre><code>Button button0, button1, button2, button3, button4, button5, button6 , button7, button8, button9,
          buttonClear, buttonDelete, buttonEqual, buttonMin, buttonPar, buttonPlus, buttonX, buttonRad,
          buttonSlash, buttonVirg;
  EditText editText;
  double op1;
  double op2;
  double result;
  String optr;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.rect_activity_my);
      final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
  
      editText = (EditText) findViewById(R.id.editText);
  
      button0 = (Button) findViewById(R.id.button0);
      button1 = (Button) findViewById(R.id.button1);
      button2 = (Button) findViewById(R.id.button2);
      button3 = (Button) findViewById(R.id.button3);
      button4 = (Button) findViewById(R.id.button4);
      button5 = (Button) findViewById(R.id.button5);
      button6 = (Button) findViewById(R.id.button6);
      button7 = (Button) findViewById(R.id.button7);
      button8 = (Button) findViewById(R.id.button8);
      button9 = (Button) findViewById(R.id.button9);
      buttonClear = (Button) findViewById(R.id.buttonClear);
      buttonEqual = (Button) findViewById(R.id.buttonEqual);
      buttonSlash = (Button) findViewById(R.id.buttonSlash);
      buttonDelete = (Button) findViewById(R.id.buttonDelete);
      buttonX = (Button) findViewById(R.id.buttonX);
      buttonMin = (Button) findViewById(R.id.buttonMin);
      buttonPlus = (Button) findViewById(R.id.buttonPlus);
      buttonDot = (Button) findViewById(R.id.buttonDot);
  
      try{
          button0.setOnClickListener(this);
          button1.setOnClickListener(this);
          button2.setOnClickListener(this);
          button3.setOnClickListener(this);
          button4.setOnClickListener(this);
          button5.setOnClickListener(this);
          button6.setOnClickListener(this);
          button7.setOnClickListener(this);
          button8.setOnClickListener(this);
          button9.setOnClickListener(this);
          buttonClear.setOnClickListener(this);
          buttonDelete.setOnClickListener(this);
          buttonEqual.setOnClickListener(this);
          buttonMin.setOnClickListener(this);
          buttonPlus.setOnClickListener(this);
          buttonX.setOnClickListener(this);
          buttonSlash.setOnClickListener(this);
          buttonDot.setOnClickListener(this);
      }
  
      catch(Exception e){
  
      }
  }
  
  public void operation(){
      if(optr.equals("+")){
          op2 = Double.parseDouble(editText.getText().toString());
          editText.setText("");
          result = op1 + op2;
          editText.setText("Result : " + Double.toString(result));
      }
      else if(optr.equals("-")){
          op2 = Double.parseDouble(editText.getText().toString());
          editText.setText("");
          result = op1 - op2;
          editText.setText("Result : " + Double.toString(result));
      }
      else if(optr.equals("*")){
          op2 = Double.parseDouble(editText.getText().toString());
          editText.setText("");
          result = op1 * op2;
          editText.setText("Result : " + Double.toString(result));
      }
      else if(optr.equals("/")){
          op2 = Double.parseDouble(editText.getText().toString());
          editText.setText("");
          result = op1 / op2;
          editText.setText("Result : " + Double.toString(result));
      }
  }
  
  @Override
  public void onClick(View arg0) {
      Editable str =  editText.getText();
      switch(arg0.getId()){
          case R.id.button1:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button1.getText());
              editText.setText(str);
              break;
          case R.id.button2:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button2.getText());
              editText.setText(str);
              break;
          case R.id.button3:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button3.getText());
              editText.setText(str);
              break;
          case R.id.button4:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button4.getText());
              editText.setText(str);
              break;
          case R.id.button5:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button5.getText());
              editText.setText(str);
              break;
          case R.id.button6:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button6.getText());
              editText.setText(str);
              break;
          case R.id.button7:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button7.getText());
              editText.setText(str);
              break;
          case R.id.button8:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button8.getText());
              editText.setText(str);
  
              break;
          case R.id.button9:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button9.getText());
              editText.setText(str);
  
              break;
          case R.id.button0:
              if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              str = str.append(button0.getText());
              editText.setText(str);
  
              break;
          case R.id.buttonClear:
              op1 = 0;
              op2 = 0;
              editText.setText("");
  
              break;
          case R.id.buttonDot:                                                     
              if (op1 == 0){
                  op1 = Double.parseDouble(editText.getText().toString());
                  editText.setText(op1 + ".");
              } else if (op2 == 0){
                  op2 = Double.parseDouble(editText.getText().toString());
                  editText.setText(op2 + ".");
              }
  
              break;
          case R.id.buttonDelete:
              editText.setText(str);
              if (str.length() &gt; 1){
                  str = (Editable) str.subSequence(0, str.length() - 1);
                  editText.setText(str);
              }else if (str.length() &lt;= 1){
                  editText.setText("");
              }
  
              break;
          case R.id.buttonPlus:
              optr = "+";
              if(op1 == 0){
                  op1 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
              }
              else if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              else{
                  op2 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
                  result = op1 + op2;
                  editText.setText("Result : " + Double.toString(result));
              }
              break;
          case R.id.buttonMin:
              optr = "-";
              if(op1 == 0){
                  op1 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
              }
              else if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              else{
                  op2 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
                  result = op1 - op2;
                  editText.setText("Result : " + Double.toString(result));
              }
              break;
          case R.id.buttonX:
              optr = "*";
              if(op1 == 0){
                  op1 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
              }
              else if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              else{
                  op2 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
                  result = op1 * op2;
                  editText.setText("Result : " + Double.toString(result));
              }
              break;
          case R.id.buttonSlash:
              optr = "/";
              if(op1 == 0){
                  op1 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
              }
              else if(op2 != 0){
                  op2 = 0;
                  editText.setText("");
              }
              else{
                  op2 = Double.parseDouble(editText.getText().toString());
                  editText.setText("");
                  result = op1 / op2;
                  editText.setText("Result : " + Double.toString(result));
              }
  
              break;
          case R.id.buttonEqual:
              if(!optr.equals(null)){
                  if(op2 != 0){
                      if(optr.equals("+")){
                          editText.setText("");
                          /*op1 = op1 + op2;*/
                          editText.setText("Result : " + Double.toString(result));
                      }
                      else if(optr.equals("-")){
                          editText.setText("");/*
                          op1 = op1 - op2;*/
                          editText.setText("Result : " + Double.toString(result));
                      }
                      else if(optr.equals("*")){
                          editText.setText("");/*
                          op1 = op1 * op2;*/
                          editText.setText("Result : " + Double.toString(result));
                      }
                      else if(optr.equals("/")){
                          editText.setText("");/*
                          op1 = op1 / op2;*/
                          editText.setText("Result : " + Double.toString(result));
                      }
                  }
                  else{
                      operation();
                  }
              }
              break;
      }
  }
  </code></pre>
  
  <p>}</p>
  
  <p>Thanks in advance</p>