Databases
StackOverflow2013
Postsdbo
POcalculator multiple values
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POcalculator multiple values
    primarykey
    data
    text
    <p>I am done with my calculator, thanks to the people here who helped me. Here what I have done:</p> <pre><code>import java.awt.*; import java.awt.event.*; public class SimpleCalculator implements ActionListener { double value1=0,value2=0,result=0; static String command=null; int counter=0; // containers private Frame f; private Panel p1, p2, p3, p4,p5,p6; // components private Label l1, l2, l3; static private TextField tf1; private Button bAdd, bSub, bMul, bDiv, bClear,b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bEqual; private static void value(String num) { if((tf1.getText()).equals("0")) tf1.setText(num); else tf1.setText(tf1.getText()+num); } public SimpleCalculator() { f = new Frame("My First GUI App"); p1 = new Panel(); p2 = new Panel(); p3 = new Panel(); p4 = new Panel(); p5 = new Panel(); p6 = new Panel(); tf1 = new TextField(15); b1 = new Button("1"); b2 = new Button("2"); b3 = new Button("3"); b4 = new Button("4"); b5 = new Button("5"); b6 = new Button("6"); b7 = new Button("7"); b8 = new Button("8"); b9 = new Button("9"); b0 = new Button("0"); bAdd = new Button("+"); bSub = new Button("-"); bMul = new Button("*"); bDiv = new Button("/"); bClear = new Button("C"); bEqual = new Button("="); } public void launchFrame() { // use default layout manager of the Panel (FlowLayout) p1.add(tf1); p2.add(b1); p2.add(b2); p2.add(b3); p3.add(b4); p3.add(b5); p3.add(b6); p4.add(b7); p4.add(b8); p4.add(b9); p5.add(b0); p6.add(bAdd); p6.add(bSub); p6.add(bMul); p6.add(bDiv); p6.add(bClear); p6.add(bEqual); // change the layout manager of the Frame, // use GridLayout(4, 1) f.setLayout(new GridLayout(6, 1)); f.add(p1); f.add(p2); f.add(p3); f.add(p4); f.add(p5); f.add(p6); f.pack(); f.setVisible(true); // register event handlers b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); b5.addActionListener(this); b6.addActionListener(this); b7.addActionListener(this); b8.addActionListener(this); b9.addActionListener(this); b0.addActionListener(this); bEqual.addActionListener(this); bAdd.addActionListener(this); bSub.addActionListener(this); bMul.addActionListener(this); bDiv.addActionListener(this); bClear.addActionListener(this); f.addWindowListener(new MyCloseButtonHandler()); } // override the actionPerformed method public void actionPerformed(ActionEvent ae) { Object source = ae.getSource(); if (source == b1) value("1"); else if (source == b2) value("2"); else if (source == b3) value("3"); else if (source == b4) value("4"); else if (source == b5) value("5"); else if (source == b6) value("6"); else if (source == b7) value("7"); else if (source == b8) value("8"); else if (source == b9) value("9"); else if (source == b0) value("0"); else if(source== bAdd){ value1=Double.parseDouble(tf1.getText()); command="+"; tf1.setText(""); } else if(source==bSub){ value1=Double.parseDouble(tf1.getText()); command="-"; tf1.setText(""); } else if(source==bDiv){ value1=Double.parseDouble(tf1.getText()); command="/"; tf1.setText(""); } else if(source == bMul){ value1=Double.parseDouble(tf1.getText()); command="*"; tf1.setText(""); } else if(source ==bClear) tf1.setText("0"); else if(source==bEqual){ value2=Double.parseDouble(tf1.getText()); if(command.equals("+")) result=value1+value2; else if(command.equals("-")) result=value1-value2; else if(command.equals("*")) result=value1*value2; else if(command.equals("/")) result=value1/value2; command="="; tf1.setText(""+result); } } private class MyCloseButtonHandler extends WindowAdapter { public void windowClosing(WindowEvent we) { System.exit(0); } } public static void main(String args[]) { double value1=0; SimpleCalculator sc = new SimpleCalculator(); sc.launchFrame(); } } </code></pre> <p>The problem is that they can't perform operations continuously, like 1+2+3, I have tried adding the values each time I press an operation, but it gives me a wrong output.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USToon Krijthe
    1. USGostores
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POcalculator multiple values
      1. This table or related slice is empty.
      1. VTDownMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload