Student Rank Calculation System using Java

In this tutorial i am going to teach the Rank Calculation System using Java step by step. based on the following condition.

• if avg is more than 90 rank should be A
• if avg is more than 80 rank should be B
• if avg is more than 70 rank should be C
• if avg is more than 60 rank should be D
• Other wise F

Here is Source code add the code in to the Ok Button

int m1,m2,m3,tot;
double avg; 
String name = txtName.getText();
m1 = Integer.parseInt(txtM1.getText());
m2 = Integer.parseInt(txtM2.getText());
m3 = Integer.parseInt(txtM3.getText());

tot = m1 + m2 + m3;

avg = tot/3;

      String rank;
     if (avg >= 90) {
         rank = "A";
     } else if (avg >= 80) {
         rank = "B";
     } else if (avg >= 70) {
         rank = "C";
     } else if (avg >= 60) {
         rank = "D";
     } else {
         rank = "F";
     }

 model = (DefaultTableModel)jTable1.getModel();
    
    model.addRow(new Object[]          
    {
        name,
        tot,
        avg,
        rank
        
    }        
   );

Clear Button

txtName.setText("");
txtM1.setText("");
txtM2.setText("");      
txtM3.setText("");     
txtName.requestFocus();

i have attached the video link below. which will do this tutorials step by step.