neue Klassen hinzugefügt, für Tests.

src/D_Test.java

@@ -1,49 +1,53 @@
+import java.awt .*;
+import javax.swing .*;
+import java.awt.event .*;
+
 public class D_Test {
-    import java.awt.*;
-import javax.swing.*;
-import java.awt.event.*;
+
+
     public class NewStudent {
-        public static void main(String[] args){
-            NewStudent st=new NewStudent();
+        public static void main(String[] args) {
+            NewStudent st = new NewStudent();
         }
 
-        public NewStudent(){
-            JFrame frame=new JFrame("STUDENT REGISTRATION FORM");
+        public NewStudent() {
+            JFrame frame = new JFrame("STUDENT REGISTRATION FORM");
             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-            frame.setSize(800,600);
+            frame.setSize(800, 600);
             frame.setVisible(true);
 
-            JPanel p1=new JPanel();
+            JPanel p1 = new JPanel();
             p1.setLayout(null);
             p1.setBackground(Color.CYAN);
 
             frame.add(p1);
-            ButtonGroup buttonGroup=new ButtonGroup();
-            JRadioButton male=new JRadioButton("MALE");
-            male.setBounds(100,170,100,20);
+            ButtonGroup buttonGroup = new ButtonGroup();
+            JRadioButton male = new JRadioButton("MALE");
+            male.setBounds(100, 170, 100, 20);
             buttonGroup.add(male);
             p1.add(male);
-            JRadioButton female=new JRadioButton("FEMALE");
-            female.setBounds(250,170,100,20);
+            JRadioButton female = new JRadioButton("FEMALE");
+            female.setBounds(250, 170, 100, 20);
             buttonGroup.add(female);
             p1.add(female);
-            JLabel sex =new JLabel("SEX:");
-            sex.setBounds(10,200,100,20);
+            JLabel sex = new JLabel("SEX:");
+            sex.setBounds(10, 200, 100, 20);
             p1.add(sex);
-            final JTextField gender= new JTextField();
-            gender.setBounds(100,200,300,20);
+            final JTextField gender = new JTextField();
+            gender.setBounds(100, 200, 300, 20);
             p1.add(gender);
 
-            male.addActionListener(new ActionListener(){
-                public void actionPerformed(ActionEvent ie){
+            male.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent ie) {
                     gender.setText("MALE");
                 }
             });
 
-            female.addActionListener(new ActionListener(){
-                public void actionPerformed(ActionEvent ie){
+            female.addActionListener(new ActionListener() {
+                public void actionPerformed(ActionEvent ie) {
                     gender.setText("FEMALE");
                 }
             });
         }
-}
+    }
+}dd