[JAVA]Interfata Calculator

[Shirogane]

• Descriere: Calculator pe principiul topicului anterior, doar că am folosit GridBagLayout în loc de GridLayout
• Poze / Video: 
• Link de descărcare: În sursă.
• Sursa (opțional): 

  Quote

  import javax.swing.*;
  import java.awt.*;
  import java.awt.event.*;
  
  
  public class Main extends JFrame implements ActionListener {
  
      private static final long serialVersionUID = 1L;
      private JTextField dsp;
      private JPanel btn_pan;
      private String[] btn_lab = {
              "7", "8", "9", "/",
              "4", "5", "6", "X",
              "1", "2", "3", "-",
              "0", "C", "=", "+"
      };
      private JButton[] btn = new JButton[btn_lab.length];
      private String opr = "";
      private double nr1, nr2, rez;
  
      private Color[] culori = {
              Color.RED, Color.BLUE, Color.GREEN, Color.YELLOW,
              Color.ORANGE, Color.PINK, Color.CYAN, Color.MAGENTA
      };
  
      public Main() {
          super("Calculator");
          setResizable(false);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          setLayout(new BorderLayout());
          interf();
      }
  
      private void interf() {
          dsp = new JTextField();
          dsp.setEditable(false);
          add(dsp, BorderLayout.NORTH);
  
          btn_pan = new JPanel();
          btn_pan.setLayout(new GridBagLayout());
          GridBagConstraints gbc = new GridBagConstraints();
          gbc.insets = new Insets(10, 10, 10, 10);
  
          int row = 0;
          int col = 0;
          for (int i = 0; i < btn_lab.length; i++) {
              btn[i] = new JButton(btn_lab[i]);
              btn[i].addActionListener(this);
              btn[i].setBackground(culori[i % culori.length]);
              gbc.gridx = col;
              gbc.gridy = row;
              btn_pan.add(btn[i], gbc);
              col++;
              if (col > 3) {
                  col = 0;
                  row++;
              }
          }
  
          btn_pan.setBackground(culori[culori.length - 1]);
  
          add(btn_pan, BorderLayout.CENTER);
          pack();
      }
  
      public void actionPerformed(ActionEvent azione) {
          String com = azione.getActionCommand();
  
          if ((com.charAt(0) >= '0' && com.charAt(0) <= '9') || com.equals(".")) {
              dsp.setText(dsp.getText() + com);
          } else if (com.equals("C")) {
              dsp.setText("");
          } else if (com.equals("=")) {
              nr2 = Double.parseDouble(dsp.getText());
              switch (opr) {
                  case "+":
                      rez = nr1 + nr2;
                      break;
                  case "-":
                      rez = nr1 - nr2;
                      break;
                  case "X":
                      rez = nr1 * nr2;
                      break;
                  case "/":
                      rez = nr1 / nr2;
                      break;
              }
              dsp.setText(String.valueOf(rez));
              opr = "";
          } else {
              if (!dsp.getText().isEmpty()) {
                  nr1 = Double.parseDouble(dsp.getText());
                  opr = com;
                  dsp.setText("");
              }
          }
      }
  
      public static void main(String[] args) {
          SwingUtilities.invokeLater(() -> {
              Main calc = new Main();
              calc.setVisible(true);
          });
      }
  }
  

   

• Alte precizări: Se poate testa. Dacă aveţi întrebări le aştept în comentarii.

 

Edited August 3 by Shirogane

[AdeM nWo]

in my opinion you shouldnt have made two topics for the same thing, they both gives the same results at the end ! 
Overall GridBagLayout is good to use for bigger projects as it is more complex to set up. 

[Shirogane]

2 hours ago, AdeM nWo said:

Overall GridBagLayout is good to use for bigger projects as it is more complex to set up. 

Agreed. That's why I decided to use that instead. I really thought of changing the first topic with this version, but I changed my mind and I chose to create a new topic with the idea updated. With this comment I also want to let the viewers know that GridBagLayout is one of the most complex and flexible layout managers from the Java Swing. It also allows you to have a better control regarding the precision and dimension of each chosen component. 

[AdeM nWo]

Thanks for your Creation !