added a new frame with small examples

src/main/java/src/Main.java

@@ -13,6 +13,9 @@ public class Main {
                 MainFrame mainFrame = new MainFrame();
                 mainFrame.run();
 
+                TasksFrame tasksFrame = new TasksFrame();
+                tasksFrame.run();
+
             }
         });
     }

src/main/java/src/TasksFrame.java

@@ -0,0 +1,172 @@
+package src;
+
+import javax.swing.*;
+import javax.swing.border.EmptyBorder;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.ArrayList;
+
+public class TasksFrame extends JFrame {
+
+    private final JScrollPane jScrollPane;
+    private JPanel container;
+
+    public TasksFrame() throws HeadlessException {
+
+        super("Unsere kleinen Tasks");
+
+        setVisible(true);
+        setBounds(810,200, 300, 600);
+        setPreferredSize(new Dimension(300, 600));
+        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        setResizable(false);
+
+        JPanel root = new JPanel();
+        root.setBounds(0, 0, 300, 600);
+        root.setVisible(true);
+
+        setContentPane(root);
+
+        container = new JPanel();
+        container.setBorder(new EmptyBorder(new Insets(3, 3, 3, 3)));
+        container.setBackground(new Color(0x839683));
+        container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
+
+        jScrollPane = new JScrollPane(container, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
+        jScrollPane.setPreferredSize(new Dimension(300, 600));
+        root.add(jScrollPane);
+
+    }
+
+    private JPanel setupPanel(String header) {
+
+        JPanel panel = new JPanel();
+        panel.setPreferredSize(new Dimension(270, 150));
+        panel.setVisible(true);
+        panel.setLayout(null);
+
+        container.add(panel);
+        container.add(Box.createVerticalStrut(5));
+
+        JLabel jLabel = new JLabel(header);
+        jLabel.setVisible(true);
+        jLabel.setBounds(3, 3, 160, 20);
+
+        panel.add(jLabel);
+
+        return panel;
+    }
+
+    public void run() {
+
+        setupHelloWorld();
+
+        setupSum();
+
+        setupSumCalc(0, 10);
+
+        setup5ModList(1, 20);
+
+    }
+
+    private ArrayList<Integer> setup5ModList(int from, int to) {
+
+        ArrayList<Integer> mods = new ArrayList<>();
+
+        JTextField jTextField = new JTextField();
+        jTextField.setVisible(true);
+        jTextField.setBounds(3, 40, 250, 30);
+
+        for (int i = from; i < to; i++) {
+            int e = i % 5;
+            mods.add(e);
+            jTextField.setText(jTextField.getText() + String.valueOf(e) + " ");
+        }
+
+
+        JPanel jPanel = setupPanel("mods 2");
+        jPanel.add(jTextField);
+
+        return mods;
+    }
+
+    private void setupSumCalc(int from, int to) {
+
+        JPanel jPanel = setupPanel("Sum from to");
+
+        JLabel jLabel = new JLabel();
+        jLabel.setVisible(true);
+        jLabel.setBounds(30, 30, 50, 20);
+
+        int sum = 0;
+        for (int i = from; i < to; i++) {
+            sum += i;
+        }
+
+        jLabel.setText(String.valueOf(sum));
+
+        jPanel.add(jLabel);
+    }
+
+    private void setupSum() {
+        JPanel jPanel = setupPanel("Summe");
+
+        JTextField a = new JTextField();
+        a.setBounds(10, 50, 30, 20);
+        a.setVisible(true);
+
+        JTextField b = new JTextField();
+        b.setBounds(50, 50, 30, 20);
+        b.setVisible(true);
+
+        JTextField result = new JTextField();
+        result.setBounds(100, 50, 30, 20);
+        result.setVisible(true);
+
+        JButton add = new JButton("add");
+        add.setBounds(10, 90, 100, 30);
+        add.setVisible(true);
+        add.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String texta = a.getText();
+                String textb = b.getText();
+                Integer val_a = Integer.valueOf(texta);
+                Integer val_b = Integer.valueOf(textb);
+                result.setText(String.valueOf(val_a+val_b));
+            }
+        });
+
+        jPanel.add(a);
+        jPanel.add(b);
+        jPanel.add(result);
+        jPanel.add(add);
+
+
+    }
+
+    private void setupHelloWorld() {
+
+        JPanel jPanel = setupPanel("Hello World");
+
+        JLabel jLabel = new JLabel();
+        jLabel.setBounds(20, 80, 150, 30);
+        jLabel.setVisible(true);
+
+        Button button = new Button("Say Hello World");
+        button.setBounds(10, 50, 150, 30);
+        button.setVisible(true);
+        button.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                jLabel.setText("Hello World");
+            }
+        });
+
+
+        jPanel.add(jLabel);
+        jPanel.add(button);
+
+    }
+}