buttons display on screen

src/main/java/com/mycompany/javacalculator/ButtonRow.java

@@ -0,0 +1,34 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.mycompany.javacalculator;
+
+import javax.swing.JButton;
+import javax.swing.JPanel;
+
+/**
+ *
+ * @author mikayladobson
+ */
+public class ButtonRow extends JPanel {
+    public ButtonRow() {}
+    
+    public ButtonRow(JButton btn) {
+        addToRow(btn);
+    }
+    
+    public ButtonRow(JButton[] buttons) {
+        addToRow(buttons);
+    }
+    
+    public void addToRow(JButton btn) {
+        this.add(btn);
+    }
+    
+    public void addToRow(JButton[] buttons) {
+        for (JButton btn : buttons) {
+            this.add(btn);
+        }
+    }
+}

src/main/java/com/mycompany/javacalculator/JavaCalculator.java

@@ -4,44 +4,102 @@
 
 package com.mycompany.javacalculator;
 
+import java.awt.Color;
 import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import javax.swing.BorderFactory;
-import javax.swing.JButton;
 import javax.swing.JFrame;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
+import com.mycompany.javacalculator.Operands.Operand;
+import java.util.Collection;
+import javax.swing.JButton;
 
 /**
  *
  * @author mikayladobson
  */
 public class JavaCalculator implements ActionListener {
+    private float storedNum = 0;
+    private float receivedNum = 0;
+    private String receivedData = "";
+    private Operand operand = null;
+    
     private final JFrame frame;
-    private final JLabel label;
     private final JPanel mainPanel;
     
+    private final JPanel calculatorScreen;
+    private final JLabel screenText;
+    
     private final NumButton btn1;
     private final NumButton btn2;
     private final NumButton btn3;
+    private final NumButton btn4;
+    private final NumButton btn5;
+    private final NumButton btn6;
+    private final NumButton btn7;
+    private final NumButton btn8;
+    private final NumButton btn9;
+    private final NumButton btn0;
+    
+    private final OpButton btnPlus;
+    private final OpButton btnMinus;
+    private final OpButton btnMultiply;
+    private final OpButton btnDivide;
+    private final OpButton btnExponent;
+    private final OpButton btnEquals;
+    private final OpButton btnDecimal;
     
     public JavaCalculator() {
         frame = new JFrame();
-        label = new JLabel("Initial value");
+        screenText = new JLabel("Initial value");
         
         mainPanel = new JPanel();
         mainPanel.setBorder(BorderFactory.createEmptyBorder(100,100,100,100));
-        mainPanel.setLayout(new GridLayout(4, 4));        
-        mainPanel.add(label);
+        mainPanel.setLayout(new GridLayout(4, 4));
+        
+        calculatorScreen = new JPanel();
+        calculatorScreen.add(screenText);
+        calculatorScreen.setBackground(Color.GRAY);
+        
+        mainPanel.add(calculatorScreen);
         
         btn1 = new NumButton(1, this);
         btn2 = new NumButton(2, this);
-        btn3 = new NumButton(3, this);
+        btn3 = new NumButton(3, this);        
+        btn4 = new NumButton(4, this);
+        btn5 = new NumButton(5, this);
+        btn6 = new NumButton(6, this);        
+        btn7 = new NumButton(7, this);
+        btn8 = new NumButton(8, this);
+        btn9 = new NumButton(9, this);
+        btn0 = new NumButton(0, this);
         
-        mainPanel.add(btn1);
-        mainPanel.add(btn2);
-        mainPanel.add(btn3);
+        btnPlus = new OpButton(Operand.ADD, this);
+        btnMinus = new OpButton(Operand.SUBTRACT, this);
+        btnMultiply = new OpButton(Operand.MULTIPLY, this);
+        btnDivide = new OpButton(Operand.DIVIDE, this);
+        btnExponent = new OpButton(Operand.EXPONENT, this);
+        btnEquals = new OpButton(Operand.EQUALS, this);
+        btnDecimal = new OpButton(Operand.DECIMAL, this);
+
+        NumButton[] numBtns = { btn1, btn2, btn3, btn4, btn5, btn6, btn7, btn8, btn9, btn0 };
+        OpButton[] opBtns = { btnPlus, btnMinus, btnMultiply, btnDivide, btnExponent, btnEquals, btnDecimal };
+
+        RowFactory rowFactory = new RowFactory(numBtns);
+        Collection<ButtonRow> btnRows = rowFactory.getRows();
+                
+        for (ButtonRow row : btnRows) {
+            mainPanel.add(row);
+        }
+        
+        rowFactory.setRows(opBtns);
+        btnRows = rowFactory.getRows();
+        
+        for (ButtonRow row : btnRows) {
+            mainPanel.add(row);
+        }
         
         frame.add(mainPanel);
         frame.setTitle("Calculator");
@@ -57,7 +115,7 @@ public class JavaCalculator implements ActionListener {
     
     @Override
     public void actionPerformed(ActionEvent e) {
-        NumButton source = (NumButton)e.getSource();
-        label.setText(source.getText());
+        JButton source = (JButton)e.getSource();
+        screenText.setText(source.getText());
     }
 }

src/main/java/com/mycompany/javacalculator/OpButton.java

@@ -0,0 +1,22 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.mycompany.javacalculator;
+
+import javax.swing.JButton;
+import com.mycompany.javacalculator.Operands.Operand;
+
+/**
+ *
+ * @author mikayladobson
+ */
+public class OpButton extends JButton {
+    private final Operand operand;
+    
+    public OpButton(Operand operand, JavaCalculator calculator) {
+        this.operand = operand;
+        this.addActionListener(calculator);
+        this.setText(Operands.toLabel(operand));
+    }
+}

src/main/java/com/mycompany/javacalculator/Operands.java

@@ -0,0 +1,45 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.mycompany.javacalculator;
+
+/**
+ *
+ * @author mikayladobson
+ */
+public class Operands {
+    public enum Operand {
+        ADD, SUBTRACT, MULTIPLY, DIVIDE, EXPONENT,
+        EQUALS, DECIMAL
+    }
+    
+    public static String toLabel(Operand input) {
+        switch (input) {
+            case ADD -> {
+                return "+";
+            }
+            case SUBTRACT -> {
+                return "-";
+            }
+            case MULTIPLY -> {
+                return "*";
+            }
+            case DIVIDE -> {
+                return "/";
+            }
+            case EXPONENT -> {
+                return "^";
+            }
+            case DECIMAL -> {
+                return ".";
+            }
+            case EQUALS -> {
+                return "=";
+            }
+            default -> {
+                throw new Error("Invalid operand input");
+            }
+        }
+    }
+}

src/main/java/com/mycompany/javacalculator/RowFactory.java

@@ -0,0 +1,47 @@
+/*
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
+ * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
+ */
+package com.mycompany.javacalculator;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import javax.swing.JButton;
+
+/**
+ *
+ * @author mikayladobson
+ */
+public class RowFactory {
+    private Collection<ButtonRow> allRows;
+    
+    public RowFactory() {
+        allRows = new ArrayList<ButtonRow>();
+    }
+    
+    public RowFactory(JButton[] btns) {
+        setRows(btns);
+    }
+    
+    public void setRows(JButton[] btns) {
+        allRows = new ArrayList<ButtonRow>();
+        int remaining = 0;
+        
+        while (remaining < btns.length) {
+            ButtonRow product = new ButtonRow();
+            
+            int i = 0;
+            while (remaining < btns.length && i < 3) {
+                product.add(btns[remaining]);
+                remaining++;
+                i++;
+            }
+            
+            allRows.add(product);
+        }
+    }
+    
+    public Collection<ButtonRow> getRows() {
+        return this.allRows;
+    }
+}