hi danpost
this is another one of the calculator that i have to build. this one is the triangle. I am getting 2 errors with it. I am trying to use the MigLayout api but it is giving me an error saying: it is telling me to create a class with a constructor
do I have to create a class called MigLayout with a constructor and why
another error am getting is. am trying to do this: frame.getContentPane().add(clear) and I am getting this error:
no suitable method found for add(String)
method Component.add(PopupMenu) is not applicable
(argument mismatch; String cannot be converted to PopupMenu)
method Container.add(Component) is not applicable
(argument mismatch; String cannot be converted to Component)
can u tell me what does that error meant and how can i fix it. here is the codes that I use. and also can u tell me if the calculation is correct.
the question is to find the area of a triangle, using a java gui and it is valid triangle.
here is the codes.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */package quadratric;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class Triangle_Calculator extends JFrame implements ActionListener { public Triangle_Calculator(){ JButton clear = new JButton("clear"); JButton exit = new JButton("exit"); Tools tls = new Tools(); } public static void main(String[]args ){ JFrame frame = new JFrame("Testing MigLayout"); JPanel contentPane = new JPanel(new MigLayout("fillx")); the error is right now //row 1 JLabel areaLabel = new JLabel("Area of Triangle"); areaLabel.setFont(areaLabel.getFont().deriveFont(16.0f)); areaLabel.setHorizontalAlignment(JLabel.CENTER); contentPane.add(areaLabel,"spanx, growx, wrap"); frame.setTitle("Triangle Calculator"); frame.getContentPane().add("clear"); the another error is right here //row 2 JLabel sideA = new JLabel("sideA"); contentPane.add(sideA, "alignx trailing"); JTextField sideAfield = new JTextField(); sideAfield.setColumns(6); contentPane.add(sideAfield,"alignx leading wrap"); //row3 JLabel sideB = new JLabel("Side B"); contentPane.add(sideB, "alignx trailing"); JTextField sideBfield = new JTextField(); sideBfield.setColumns(6); contentPane.add(sideBfield, "alignx leading, wrap"); //row 4 JLabel sideC = new JLabel("Side C"); contentPane.add(sideC, "alignx trailing"); JTextField sideCfield = new JTextField(); sideCfield.setColumns(6); contentPane.add(sideCfield,"alignx leading, wrap"); //row 5 JButton calbtn = new JButton("Calculator Area"); contentPane.add(calbtn, "spanx, grows"); JTextField ans = new JTextField("ans"); calbtn.addActionListener(null); frame.setContentPane(contentPane); frame.pack(); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); } @Override public void actionPerformed(ActionEvent e) { if(e.getActionCommand().equalsIgnoreCase("exit")) System.exit(0); if(e.getActionCommand().equalsIgnoreCase("clear")) if(e.getActionCommand().equalsIgnoreCase("ans")) } private double areaTriangle(double sideA,double sideB,double sideC){ if(isTriangleValid(sideA, sideB,sideC) == true){ System.out.println(areaTriangle(sideA,sideB, sideC)); } return 0; } public boolean isTriangleValid(double sideA, double sideB, double sideC){ if((sideA + sideB) > sideC && (sideA + sideC) > sideB && (sideB + sideC) > sideA){ return true; } else{ } return false; } } |
