char a=' ';

    private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
    }

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(jTextField2.getText()+"1");
    }

    private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"0");
    }

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(jTextField2.getText()+"2");
    }

    private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"3");
    }

    private void jButton6ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"4");
    }

    private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"5");
    }

    private void jButton8ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"6");
    }

    private void jButton9ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(jTextField2.getText()+"7");
    }

    private void jButton10ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(jTextField2.getText()+"8");
    }

    private void jButton11ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField2.setText(jTextField2.getText()+"9");
    }

    private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(jTextField2.getText()+".");
    }

    private void jButton12ActionPerformed(java.awt.event.ActionEvent evt) {
       jTextField1.setText(jTextField2.getText());
       a = '+';
       jTextField2.setText(" ");
    }

    private void jButton14ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField1.setText(jTextField2.getText());
       a = '-';
       jTextField2.setText(" ");
    }

    private void jButton15ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField1.setText(jTextField2.getText());
       a = '*';
       jTextField2.setText(" ");
    }

    private void jButton16ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField1.setText(jTextField2.getText());
       a = '/';
       jTextField2.setText(" ");
    }

    private void jButton17ActionPerformed(java.awt.event.ActionEvent evt) {
        float p=Float.parseFloat(jTextField1.getText()+"");
        float o=Float.parseFloat(jTextField2.getText()+"");
        if (a=='+')jTextField2.setText(p+o+"");
        if (a=='-')jTextField2.setText(p-o+"");
        if (a=='*')jTextField2.setText(p*o+"");
        if (a=='/')jTextField2.setText(p/o+"");
        if (a=='x')jTextField2.setText(p*p+"");
        double d=(Math.pow(Integer.parseInt(jTextField1.getText()), Integer.parseInt(jTextField2.getText())));
        if (a=='^')jTextField2.setText(d+"");

    }

    private void jButton13ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(" ");
    }

    private void jButton18ActionPerformed(java.awt.event.ActionEvent evt) {
        jTextField2.setText(" ");
         jTextField1.setText(" ");
    }

    private void jButton19ActionPerformed(java.awt.event.ActionEvent evt) {
    double b=(Math.pow(Integer.parseInt(jTextField2.getText()), 2));
    jTextField1.setText(b+"");


    }

    private void jButton20ActionPerformed(java.awt.event.ActionEvent evt) {
    double c=(Math.sqrt(Integer.parseInt(jTextField2.getText())));
    jTextField1.setText(c+"");


    }

    private void jButton21ActionPerformed(java.awt.event.ActionEvent evt) {

        jTextField1.setText(jTextField2.getText()+"");
        a = '^';
        jTextField2.setText("");