Solved

adding names/text to a shape drawn in java

Posted on 2004-03-23
10
267 Views
Last Modified: 2010-03-31
hi,
here's what i need help with. i have one table in my database and what i want to happen is that the name of that database should appear on the shape( preferrable rectangle) that i have drawn.
i have the code for getting the name for the database shown below.

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
 conn=DriverManager.getConnection("jdbc:odbc:myDB","userid","password");
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet rs = dbmd.getTables(null,null,null,new String[]{"TABLE"});
System.out.println("the tables in the database are:");

while(rs.next())
{
    String tables = rs.getString("TABLE_NAME");
    System.out.println(tables);
}                              
conn.close();


i know the code for drawing a rectangle goes something like this:

public void paint(Graphics g)
{
  g.drawLine(55,75,225,75);

  g.drawRect(30,50,50,50);
  g.setColor(Color.green);
  g.fillRect(31,51,49,49);
   g.setColor(Color.red);
  g.drawString("A", 55, 75);
              
}

so, instead of that "A" appearing, i want the name of the table to appear. any assistance would be greatly appreciated
0
Comment
Question by:msberth
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 3
10 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 10658861
You just need to drawString(tableName,......


instead
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10658891
Make 'tables' an instance variable:

while(rs.next())
{
      tables = rs.getString("TABLE_NAME");
         System.out.println(tables);
}                        



..........

g.drawString(tables, 55, 75);


0
 

Author Comment

by:msberth
ID: 10660483
ok. what if more than one table in the database exist. say four? and i want the rectangles to be displayed at different(random location) locations.  for example, if there are four tables, then there should be four rectangles. i dont want to be the one to specify the number of rectangles to be drawn.
0
PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

 
LVL 86

Expert Comment

by:CEHJ
ID: 10660578
Then you'd need to iterate them.

List tableList = new ArrayList();

.......


while(rs.next())
{
     String table = rs.getString("TABLE_NAME");
     tableList.add(table);
}                        

.........

// (in paint or paintComponent)

final int WIDTH = getWidth();
final int HEIGHT = getHeight();
Iterator iter = tableList.iterator();
while (iter.hasNext()) {
     drawString(iter.next().toString(), (int)(Math.random() * WIDTH), (int)(Math.random() * HEIGHT));



0
 

Author Comment

by:msberth
ID: 10661955
thanx
one more thing before i close the question. how about adding actionlistener/mouselistener to a rectangle clicked. say for example i click on one of the displayed rectangles, then a message like "the rectangle named ,"name on rectangle", "has been clicked.
i hope you can help.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10661983
0
 

Author Comment

by:msberth
ID: 10674758
that doesnt help much. can you be a bit clearer
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 30 total points
ID: 10682273
>>
say for example i click on one of the displayed rectangles, then a message like "the rectangle named ,"name on rectangle", "has been clicked.
>>
// 'rects' is an array of Rectangle
for(int i = 0;i < rects.length;i++) {
      boolean wasHit = rects[i].contains(mouseEvent.getPoint());
      if (wasHit) {
            System.out.println("Rect " + i + " was clicked");
      }
 
}


0

Featured Post

Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
Suggested Courses

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question