Difference

src/main/java/src/TasksFrame.java

@@ -69,6 +69,10 @@ public class TasksFrame extends JFrame {
         setup5ModList(1, 20);
 
         setupLeibnizR(1000);
+        
+        setupDiff();
+
+
 
     }
 
@@ -129,6 +133,48 @@ public class TasksFrame extends JFrame {
         jPanel.add(jLabel);
     }
 
+    public void setupDiff(){
+        JPanel jPanel = setupPanel("Difference");
+
+        JTextField x = new JTextField();
+        x.setBounds(10,50,30,20);
+        x.setVisible(true);
+
+        JTextField y = new JTextField();
+        y.setBounds(50,50,30,20);
+        y.setVisible(true);
+
+        JTextField result = new JTextField();
+        result.setBounds(100,50,30,20);
+        result.setVisible(true);
+
+        JButton difference = new JButton("Difference");
+        difference.setBounds(10,90,100,30);
+        difference.setVisible(true);
+
+        difference.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String textx = x.getText();
+                String texty = y.getText();
+                Integer val_x = Integer.valueOf(textx);
+                Integer val_y = Integer.valueOf(texty);
+                Integer res = calcDiff(val_x, val_y);
+                result.setText(String.valueOf(res));
+            }
+        });
+
+        jPanel.add(x);
+        jPanel.add(y);
+        jPanel.add(result);
+        jPanel.add(difference);
+
+    }
+
+    public int calcDiff(int a, int b) {
+        return a-b;
+    }
+
     private void setupSum() {
         JPanel jPanel = setupPanel("Summe");
 

src/test/java/src/TasksFrameTest.java

@@ -12,4 +12,20 @@ class TasksFrameTest {
         double x = tasksFrame.setupLeibnizR(100000);
         assertEquals(Math.PI/4, x, 0.00001, "Die Werte sind unterschiedlich. Soll: 0.785 Ist:" +x);
     }
-}
+
+    @Test
+    void setupDiff(){
+        TasksFrame frame = new TasksFrame();
+        int diff = frame.calcDiff(6, 7);
+        assertEquals(-1, diff);
+        int diff2 = frame.calcDiff(0,0);
+        assertEquals(0,diff2);
+        int diff3 = frame.calcDiff(12, 8);
+        assertEquals(4, diff3);
+    }
+
+
+    }
+
+
+