Farbe von Buttons geändert

src/main/java/src/TasksFrame.java

@@ -7,6 +7,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.LinkedList;
+import java.awt.Color;
 
 public class TasksFrame extends JFrame {
 
@@ -90,6 +91,8 @@ public class TasksFrame extends JFrame {
         JButton button = new JButton("round sum");
         button.setVisible(true);
         button.setBounds(10, 65, 100, 30);
+        button.setForeground(Color.WHITE);
+        button.setBackground(Color.BLUE);
 
         JTextField a = new JTextField();
         a.setBounds(10, 40, 30, 20);
@@ -150,6 +153,8 @@ public class TasksFrame extends JFrame {
         JButton button = new JButton("kgV");
         button.setVisible(true);
         button.setBounds(10, 65, 100, 30);
+        button.setForeground(Color.WHITE);
+        button.setBackground(Color.BLUE);
 
         JTextField a = new JTextField();
         a.setBounds(10, 40, 30, 20);
@@ -195,6 +200,8 @@ public class TasksFrame extends JFrame {
         JButton button = new JButton("Quersumme");
         button.setVisible(true);
         button.setBounds(10, 65, 100, 30);
+        button.setForeground(Color.WHITE);
+        button.setBackground(Color.BLUE);
 
         JTextField jTextField = new JTextField();
         jTextField.setVisible(true);
@@ -240,6 +247,8 @@ public class TasksFrame extends JFrame {
         JButton button = new JButton("calc Phi");
         button.setVisible(true);
         button.setBounds(10, 65, 100,  30);
+        button.setForeground(Color.WHITE);
+        button.setBackground(Color.BLUE);
 
         JTextField jTextField = new JTextField();
         jTextField.setVisible(true);
@@ -301,9 +310,11 @@ public class TasksFrame extends JFrame {
         jLabel.setBounds(20, 80, 150, 30);
         jLabel.setVisible(true);
 
-        Button button = new Button("Say Hello World");
+        JButton button = new JButton("Say Hello World");
         button.setBounds(10, 50, 150, 30);
         button.setVisible(true);
+        button.setForeground(Color.WHITE);
+        button.setBackground(Color.BLUE);
         button.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
@@ -345,6 +356,8 @@ public class TasksFrame extends JFrame {
         JButton add = new JButton("add");
         add.setBounds(10, 90, 100, 30);
         add.setVisible(true);
+        add.setForeground(Color.WHITE);
+        add.setBackground(Color.BLUE);
         add.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
@@ -400,6 +413,8 @@ public class TasksFrame extends JFrame {
         JButton difference = new JButton("Difference");
         difference.setBounds(10,90,100,30);
         difference.setVisible(true);
+        difference.setForeground(Color.WHITE);
+        difference.setBackground(Color.BLUE);
 
         difference.addActionListener(new ActionListener() {
             @Override
@@ -451,6 +466,8 @@ public class TasksFrame extends JFrame {
         JButton area = new JButton("Calculate area");
         area.setVisible(true);
         area.setBounds(0, 80, 180,30);
+        area.setForeground(Color.WHITE);
+        area.setBackground(Color.BLUE);
 
         JTextField areaRes = new JTextField();
         areaRes.setBounds(200,80,30,20 );
@@ -478,6 +495,8 @@ public class TasksFrame extends JFrame {
         JButton perimeter = new JButton("Calculate perimeter");
         perimeter.setVisible(true);
         perimeter.setBounds(0, 110, 180,30);
+        perimeter.setForeground(Color.WHITE);
+        perimeter.setBackground(Color.BLUE);
 
         JTextField perimeterRes = new JTextField();
         perimeterRes.setBounds(200,110,30,20 );
@@ -532,6 +551,8 @@ public class TasksFrame extends JFrame {
         JButton sumFromTo = new JButton("calculate");
         sumFromTo.setBounds(10,90,100,30);
         sumFromTo.setVisible(true);
+        sumFromTo.setForeground(Color.WHITE);
+        sumFromTo.setBackground(Color.BLUE);
 
         sumFromTo.addActionListener(new ActionListener() {
             @Override