SIMPLE CALCULATOR USE THE FOLLOWING SCRIPT IN NETBEANS AND CHANGE TEXTFEILD NAME ACORDINGLY

SCRIPT FOR  +  BUTTON

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if (txtnum1.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

if (txtnum2.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

float num=Float.parseFloat(txtnum1.getText());
float num2=Float.parseFloat(txtnum2.getText());
float res=0;
res =num+num2;

txtres.setText(res+"");


SCRIPT FOR  -  BUTTON

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if (txtnum1.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

if (txtnum2.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

        
float num=Float.parseFloat(txtnum1.getText());
float num2=Float.parseFloat(txtnum2.getText());



float res=0;
res =num-num2;

txtres.setText(res+"");



SCRIPT FOR  X  BUTTON

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if (txtnum1.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

if (txtnum2.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

        
float num=Float.parseFloat(txtnum1.getText());
float num2=Float.parseFloat(txtnum2.getText());



float res=0;
res =num*num2;

txtres.setText(res+"");

SCRIPT FOR  ÷  BUTTON

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if (txtnum1.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

if (txtnum2.getText().isEmpty())
    JOptionPane.showMessageDialog(this,"THIS FEILD CANNOT LEFT EMPTY");

        
float num=Float.parseFloat(txtnum1.getText());
float num2=Float.parseFloat(txtnum2.getText());



float res=0;
res =num/num2;

txtres.setText(res+"");

SCRIPT FOR  clear  BUTTON

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txtnum1.setText("");
txtnum2.setText("");
txtres.setText("");



SCRIPT FOR  exit  BUTTON

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System.exit(0);

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