• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 408
  • Last Modified:

populate a jtable from a map

I am creating a jtable in a dialog.  Right now I am just putting in static values as you will see in the code.  I would like to learn how to populate the table with a map.

 
private JPanel selectedTable(){
		
    JLabel tLabel = new JLabel("Selections");
		
	JPanel p = new JPanel();
    p.setBorder(BorderFactory.createLineBorder(Color.blue));
    GridBagLayout gridbag = new GridBagLayout();
    p.setLayout(gridbag);
    
    
 // Create columns names
	String columnNames[] = { "Item ID", "Rev ID", "PRL", "Dataset", "EC Markup Included" };
    
// Create some data
	String dataValues[][] =
	{
		{ "1", "2", "3", "4", "5" },
		{ "6", "7", "8", "9", "10" },
		{ "93", "89.2", "109", "11", "12"}
	};   
	
	// Create a new table instance
	selectTable = new JTable( dataValues, columnNames );
	selectTable.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
	selectTable.setCellSelectionEnabled(false);
	selectTable.setRowSelectionAllowed(true);
	selectTable.setColumnSelectionAllowed(false);
	//selectTable.setMinimumSize(table.getPreferredSize());

	// Add the table to a scrolling pane
	 JScrollPane ScrollPane = new JScrollPane(selectTable);
	 
	 
	   
	gbc.insets = new Insets(5,10,10,5);      
    set_gbc(0, 0, 1, 1,GridBagConstraints.BOTH );
    gridbag.setConstraints(tLabel, gbc);
    p.add(tLabel);
	
    gbc.gridx = 0;
    gbc.gridy = 1;
    gbc.gridwidth = GridBagConstraints.REMAINDER;
    gbc.gridheight = 1;
    gbc.weightx = 1;
    gbc.weighty = 1;
    gbc.fill = GridBagConstraints.BOTH; 
    //set_gbc(0, 1, 1, 1,GridBagConstraints.BOTH );
    //gridbag.setConstraints(ScrollPane, gbc);
    
    p.add(ScrollPane,gbc);
    
    return p;
}

Open in new window


my map is called newMap .  I would like for my key to be column ItemId and the value be column RevId.

Thanks
0
jkteater
Asked:
jkteater
  • 4
2 Solutions
 
for_yanCommented:


You can create a variable of DaefaulTableModel type and populate it with your data;
This is an example:
http://www.java2s.com/Code/JavaAPI/javax.swing.table/DefaultTableModeladdRowObjectrowData.htm
0
 
for_yanCommented:

I assume that you have some RevType object which has all these fields
and you newMap has ID maped to objects of RevType type
Then this is how you populate your model:

 private DefaultTableModel model;
 model = new DefaultTableModel();

for (String s: columnNmaes){
model.addColumn(s);

}

Set set = newMap.keySet();

for (String s : set){

RevType r = newMap.get(s);
Vector<String> v = new Vector<String>();
v.addElement(r.getItemID());
v.addElement(r.getRevID();
...

model.addRow(v);



}

jtable.sertModel(model);

Open in new window

0
 
CEHJCommented:
>>I would like to learn how to populate the table with a map.

For your Map<K, V> , what type is K and what type is V?
0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
for_yanCommented:

As far as I rememeber
you actually have ArrayList <String>userObjects which has the set of keys (TYPEs)
and HashMap<String,ItemRev> which has the data mapped to the Keys as ItemRev objects


So then this is how you create table model very siimilar to waht I posted above but with more familiar names:
 private DefaultTableModel model;
 model = new DefaultTableModel();

for (String s: columnNmaes){
model.addColumn(s);

}



for (String s : userObjects){

ItemRev r = map.get(s);



Vector<String> v = new Vector<String>();
v.addElement(r.getItemID());
v.addElement(r.getRevID();
...


model.addRow(v);
}


}

jtable.sertModel(model);

Open in new window

0
 
jkteaterAuthor Commented:
I have just found out that from my team lead that I can not use a map.  I have to use a list because my map is object, object and the actual data is more object, array.  So I will adjust the points and close this question.
0
 
for_yanCommented:
What means object,object and object,array and why you cannot use map?
Map can also be String-Array if you need (with String being the key and array of Strings being the value).
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Introducing Cloud Class® training courses

Tech changes fast. You can learn faster. That’s why we’re bringing professional training courses to Experts Exchange. With a subscription, you can access all the Cloud Class® courses to expand your education, prep for certifications, and get top-notch instructions.

  • 4
Tackle projects and never again get stuck behind a technical roadblock.
Join Now