Area of a Rectangle

src/main/java/src/TasksFrame.java

@@ -17,13 +17,13 @@ public class TasksFrame extends JFrame {
         super("Unsere kleinen Tasks");
 
         setVisible(true);
-        setBounds(810,200, 300, 600);
-        setPreferredSize(new Dimension(300, 600));
+        setBounds(810,200, 400, 600);
+        setPreferredSize(new Dimension(400, 600));
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setResizable(false);
 
         JPanel root = new JPanel();
-        root.setBounds(0, 0, 300, 600);
+        root.setBounds(0, 0, 400, 600);
         root.setVisible(true);
 
         setContentPane(root);
@@ -34,7 +34,7 @@ public class TasksFrame extends JFrame {
         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));
+        jScrollPane.setPreferredSize(new Dimension(400, 600));
         root.add(jScrollPane);
 
     }
@@ -51,7 +51,7 @@ public class TasksFrame extends JFrame {
 
         JLabel jLabel = new JLabel(header);
         jLabel.setVisible(true);
-        jLabel.setBounds(3, 3, 160, 20);
+        jLabel.setBounds(3, 3, 300, 20);
 
         panel.add(jLabel);
 
@@ -66,6 +66,8 @@ public class TasksFrame extends JFrame {
 
         setupDiff();
 
+        setupArea();
+
         setupSumFromTo();
 
         setup5ModList(1, 20);
@@ -207,6 +209,64 @@ public class TasksFrame extends JFrame {
         return a-b;
     }
 
+    public void setupArea()
+    {
+        JPanel jPanel = setupPanel("Area and perimeter of a Rectangle:");
+
+        JLabel jL1 = new JLabel();
+        jL1.setText("Side a:");
+        jL1.setVisible(true);
+        jL1.setBounds(0,20,50,30);
+
+        JLabel jL2 = new JLabel();
+        jL2.setText("Side b:");
+        jL2.setVisible(true);
+        jL2.setBounds(0,40,50,30);
+
+        JTextField a = new JTextField();
+        a.setVisible(true);
+        a.setBounds(50,25,30,20);
+
+        JTextField b = new JTextField();
+        b.setVisible(true);
+        b.setBounds(50,45,30,20);
+
+        JButton area = new JButton("Calculate area");
+        area.setVisible(true);
+        area.setBounds(0, 80, 180,30);
+
+        JTextField areaRes = new JTextField();
+        areaRes.setBounds(200,80,30,20 );
+        areaRes.setVisible(true);
+
+        area.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);
+                Integer res = calcArea(val_a, val_b);
+                areaRes.setText(String.valueOf(res));
+            }
+        });
+
+        jPanel.add(jL1);
+        jPanel.add(jL2);
+        jPanel.add(a);
+        jPanel.add(b);
+        jPanel.add(area);
+        jPanel.add(areaRes);
+
+    }
+
+    public int calcArea(int a, int b)
+    {
+        int area = a * b;
+        return area;
+    }
+
+
 
     public void setupSumFromTo(){
 
@@ -294,4 +354,6 @@ public class TasksFrame extends JFrame {
 
         return sum;
     }
+
+
 }

src/test/java/src/TasksFrameTest.java

@@ -7,14 +7,16 @@ import static org.junit.jupiter.api.Assertions.*;
 class TasksFrameTest {
 
     @Test
-    void setupLeibnizR() {
+    void setupLeibnizR()
+    {
         TasksFrame tasksFrame = new TasksFrame();
         double x = tasksFrame.setupLeibnizR(100000);
         assertEquals(Math.PI/4, x, 0.00001, "Die Werte sind unterschiedlich. Soll: 0.785 Ist:" +x);
     }
 
     @Test
-    void setupDiff(){
+    void setupDiff()
+    {
         TasksFrame frame = new TasksFrame();
         int diff = frame.calcDiff(6, 7);
         assertEquals(-1, diff);
@@ -25,7 +27,8 @@ class TasksFrameTest {
     }
 
     @Test
-    void setupSumm(){
+    void setupSumm()
+    {
         TasksFrame frame = new TasksFrame();
         int sum1 = frame.calcSumm(23, 11);
         assertEquals(34, sum1);
@@ -36,7 +39,8 @@ class TasksFrameTest {
     }
 
     @Test
-    void setupSumFromTo(){
+    void setupSumFromTo()
+    {
         TasksFrame frame = new TasksFrame();
         int p1= frame.sumCalc(1,5);
         assertEquals(15,p1);
@@ -46,6 +50,17 @@ class TasksFrameTest {
         assertEquals(3,p3);
     }
 
+    @Test
+    void setupArea()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1 = tasksFrame.calcArea(3,5);
+        assertEquals(15, p1);
+        int p2= tasksFrame.calcArea(0,7);
+        assertEquals(0,p2);
+
+    }
+
     }