Ross Gerard

I dont use IDES on a regular basis. Thanks for the link!

thanks, that worked. What a strange message.

Trying to get code to compile but getting strange error message.

public class App { public static void main(String args[]) { myJFrame mjf = new myJFrame(); } }



import javax.swing.*; public class MyJFrame extends JFrame { public MyJFrame () { super ("My First Frame"); MyJPanel mjp = new MyJPanel(); getContentPane().add(mjp,"Center"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize (640, 480); setVisible(true); } }











import java.awt.*; import javax.swing.*; import java.awt.event.*; public class MyJPanel extends JPanel { public MyJPanel() { super(); setBackground(Color.gray); Student s1 = new Student("Ross","Ross",25); setLayout(new BorderLayout()); MyJPanel1 p1 = new MyJPanel1(); MyJPanel2 p2 = new MyJPanel2(); p2.b2 = new JButton("Whatsup"); p1.b1 = new JButton(s1.firstName); p2.add(p2.b2); p2.b2.setVisible(false); p1.b1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { //Execute when button is pressed //System.out.println("You clicked the button"); p2.b2.setVisible(true); } }); p1.add(p1.b1); add(p1,"North"); add(p2,"Center"); } }

import java.awt.*; import javax.swing.*; public class MyJPanel1 extends JPanel { JButton b1; public MyJPanel1() { super(); setBackground(Color.yellow); b1 = new JButton("student info will be here later ..."); // add(b1); } }




import java.awt.*; import javax.swing.*; public class MyJPanel2 extends JPanel { JButton b2; public MyJPanel2() { super(); setBackground(Color.pink); b2 = new JButton("Whats Up will be shown here" ); // add(b2); } }





public class Student { String firstName; String lastName; int age; public Student(String a, String b, int x) { super(); firstName = a; lastName = b; age = x; } String getInfo() { return "NAME = "+firstName+ " "+lastName+" "+"Age = "+age; } String whatsUp() { double r = Math.random(); int myNumber = (int) (r * 3f); //comment: a random number between 0 and 2 String answer = "I don't know"; if(myNumber == 0) answer = "searching the web"; if(myNumber == 1) answer = "doing Java"; if(myNumber == 2) answer = "Listening to endless lecture"; return answer; } }

Constructor Detail

BorderLayout

public BorderLayout()

Constructs a new border layout with no gaps between components.


http://docs.oracle.com/javase/7/docs/api/java/awt/BorderLayout.html#LINE_START

Hello I am trying to have an equal east and wast panel divided down the middle. But I keep getting a gap between the two. I want no gap.


import java.awt.*; import javax.swing.*; public class MyJPanel extends JPanel { public MyJPanel(Student st1){ super(); setBackground(Color.gray); setLayout(new BorderLayout()); MyJPanel1 p1 = new MyJPanel1(st1); add(p1,"West"); MyJPanel2 p2 = new MyJPanel2(st1); add(p2,"East"); p1.setP2(p2); p2.setP1(p1); } }

import java.awt.*; import javax.swing.*; import java.awt.event.*; public class MyJPanel2 extends JPanel implements ActionListener { JButton b2; Student st1; MyJPanel1 p1 = null; public void setP1(MyJPanel1 p1){ this.p1 =p1; p1.b1.addActionListener(this); } public MyJPanel2() { super(); st1 = new Student("Fred","Fonseca",44); setBackground(Color.pink); b2 = new JButton(st1.whatsUp()); add(b2); } @Override public void actionPerformed(ActionEvent e) { b2.setText(st1.whatsUp()); p1.b1.setText(st1.getInfo()); } }


Here is the solution all

This donesnt work unfort.


public void setButtonsActionListener(ActionListener listener){ p1.b1.addActionListener(this); }

I simply want to select b1 with a mouse click and change b2 to random in actionPerformed but having problems with strange error message when I try to: //p1.b1.addActionListener(this); on MyJPanel2 I am not allowed to change anything in MyJPanel1. Exception in Main errorpublic class App { public static void main(String args[]) { MyJFrame mjf = new MyJFrame(); } }
import java.awt.*; import javax.swing.*; public class MyJFrame extends JFrame { public MyJFrame () { super ("My First Frame"); MyJPanel mjp = new MyJPanel(); getContentPane().add(mjp,"Center"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize (640, 480); setVisible(true); } }
import java.awt.*; import javax.swing.*; public class MyJPanel extends JPanel { public MyJPanel() { super(); setBackground(Color.gray); setLayout(new BorderLayout()); MyJPanel1 p1 = new MyJPanel1(); MyJPanel2 p2 = new MyJPanel2(); add(p1,"North"); add(p2,"Center"); p2.setP1(p1); } }
import java.awt.*; import javax.swing.*; import java.awt.event.*; public class MyJPanel1 extends JPanel { JButton b1; public MyJPanel1() { super(); setBackground(Color.yellow); b1 = new JButton("student info will be here later ..."); add(b1); } }
import java.awt.*; import javax.swing.*; import java.awt.event.*; public class MyJPanel2 extends JPanel implements ActionListener { JButton b2; Student st1; String studentAction; MyJPanel1 p1 = null; public void setP1(MyJPanel1 p1){ this.p1 =p1; } public MyJPanel2() { super(); //p1.b1.addActionListener(this); st1 = new Student("Fred","Fonseca",44); setBackground(Color.pink); b2 = new JButton("whats Up will be shown here" ); add(b2); } @Override public void actionPerformed(ActionEvent ae) { double r = Math.random(); int myNumber = (int)(r*3f); if (myNumber == 0){ studentAction = "Reading"; } if (myNumber == 1){ studentAction = "Talking"; } if (myNumber == 2){ studentAction = "Interacting"; } b2.setText(studentAction); } }

import java.awt.*; import javax.swing.*; public class Student { String firstName; String lastName; int age; public Student(String a, String b, int x) { super(); firstName = a; lastName = b; age = x; } String getInfo() { return "NAME = "+firstName+ " "+lastName+" "+"Age = "+age; } String whatsUp() { double r = Math.random(); int myNumber = (int) (r * 3f); //comment: a random number between 0 and 2 String answer = "I don't know"; if(myNumber == 0) answer = "searching the web"; if(myNumber == 1) answer = "doing Java"; if(myNumber == 2) answer = "Listening to endless lecture"; return answer; } }

I have command line downloaded for startes and plenty of books. Just wondering about the pi emulator now

Hi everyone. Thanks for taking the time to read my post. I like messing around with computers or electronics and especially getting them attached to toys. So, I am looking for a platform to program with python. Ideally I would love to find an online emulator that allows me to practice my code on a pi device? If anyone could help me out it would be greatly appreciated.

I am working on it. Just need different perspectives like yours to bring it together for me. Thank you.

Okay, I can fiy the formatting of code to this style no problem and seperate each if statement by a blank line. Thanks for the find there was wondering why it semi worked but I didn#t get an error. Thanks for the tips it will sink in with practice. This is the first I have heard about debug statements however. I don´t know how to display the value of a random unless I println it. Is that what you mean?

Hello, I want my program to listen to jl1 and read a random activity from b2 eachtime jl1 is pressed. For some reason each time I press jl1 nothing happens until the second time I press it then it always gives the same random response. I need some advice please.

import javax.swing.*; public class MyJFrame extends JFrame { public MyJFrame () { super ("My First Frame"); Student st1 = new Student("Fred","Fonseca",44); MyJPanel mjp = new MyJPanel(st1); getContentPane().add(mjp,"Center"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize (640, 480); setVisible(true); } }





import java.awt.*; import javax.swing.*; public class MyJPanel extends JPanel { public MyJPanel(Student st1){ super(); setBackground(Color.gray); setLayout(new BorderLayout()); MyJPanel1 p1 = new MyJPanel1(st1); add(p1,"North"); MyJPanel2 p2 = new MyJPanel2(); add(p2,"Center"); p1.setP2(p2); p2.setP1(p1); } }






import java.awt.*; import javax.swing.*; import java.awt.event.*; public class MyJPanel1 extends JPanel implements ActionListener { JButton jl1; MyJPanel2 p2 = null; public void setP2(MyJPanel2 p2){ this.p2 =p2; } public MyJPanel1(Student st1){ super(); setBackground(Color.yellow); jl1 = new JButton(st1.getInfo()); jl1.addActionListener(this); add(jl1); } @Override public void actionPerformed(ActionEvent e) { String b; double r = Math.random(); int myNumber = (int)(r*3f); if (myNumber == 0){ b = "Reading"; if (myNumber == 1){ b = "Talking"; } if (myNumber == 2){ b = "Interacting"; } p2.b2.setText(b); } { } }}




import java.awt.*; import javax.swing.*; public class MyJPanel2 extends JPanel { JButton b1,b2,b3,b4; String b; MyJPanel1 p1 = null; public void setP1(MyJPanel1 p1){ this.p1 =p1; } public MyJPanel2(){ super(); MyJPanel1 p1 = null; setBackground(Color.pink); b1 = new JButton ("When the user clicks on the button in the UPPER panel"); add(b1); b2 = new JButton("Display here whatsUp from the student in UPPER Panel" ); add(b2); b3 = new JButton("===>>>>You CANNOT create a student here <======" ); add(b3); b4 = new JButton("It has to be the student from the UPPER Panel" ); add(b4); } }



public class Student { String firstName; String lastName; int age; public Student(String a, String b, int x) { super(); firstName = a; lastName = b; age = x; } String getInfo() { return "NAME = "+firstName+ " "+lastName+" "+"Age = "+age; } }

That was a great explanation I appreciate it. Now I can use that and study that then look up examples at Oracle. Thank you.

Abstract I want mjp1 and MJP2 to talk to each other and share objects. Not sure how.
Goal to enable jl1 when clicked to execture action listener on b2



public class App { public static void main(String args[]) { MyJFrame mjf = new MyJFrame(); } }





import javax.swing.*; public class MyJFrame extends JFrame { public MyJFrame () { super ("My First Frame"); Student st1 = new Student("Fred","Fonseca",44); MyJPanel mjp = new MyJPanel(st1); getContentPane().add(mjp,"Center"); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize (640, 480); setVisible(true); } }






import java.awt.*; import javax.swing.*; public class MyJPanel extends JPanel { private JButton q; public MyJPanel(Student st1){ super(); setBackground(Color.gray); setLayout(new BorderLayout()); MyJPanel1 p1 = new MyJPanel1(st1,q); add(p1,"North"); MyJPanel2 p2 = new MyJPanel2(q); add(p2,"Center"); } }







import java.awt.*;
import javax.swing.*;
import java.awt.event.*;



public class MyJPanel1 extends JPanel implements ActionListener { String b = "a"; JButton jl1; public MyJPanel1(Student st1, JButton c){ super(); setBackground(Color.yellow); jl1 = new JButton(st1.getInfo()); jl1.addActionListener(this); add(jl1); } @Override public void actionPerformed(ActionEvent e) { double r = Math.random(); int myNumber = (int)(r*3f); if (myNumber == 0){ b = "Reading"; if (myNumber == 1){ b = "Talking"; } if (myNumber == 2){ b = "Interacting"; } //b2.setText(b); } }}






import java.awt.*; import javax.swing.*; public class MyJPanel2 extends JPanel { JButton b1,b2,b3,b4; String b; public MyJPanel2(JButton b2){ super(); setBackground(Color.pink); b1 = new JButton ("When the user clicks on the button in the UPPER panel"); add(b1); b2 = new JButton("Display here whatsUp from the student in UPPER Panel" ); add(b2); b3 = new JButton("===>>>>You CANNOT create a student here <======" ); add(b3); b4 = new JButton("It has to be the student from the UPPER Panel" ); add(b4); } }








public class Student { String firstName; String lastName; int age; public Student(String a, String b, int x) { super(); firstName = a; lastName = b; age = x; } String getInfo() { return "NAME = "+firstName+ " "+lastName+" "+"Age = "+age; } String whatsUp() { double r = Math.random(); int myNumber = (int) (r * 3f); String answer = "I don't know"; if(myNumber == 0) answer = "searching the web"; if(myNumber == 1) answer = "doing Java"; if(myNumber == 2) answer = "Listening to endless lecture"; return answer; } }