Neha
Neha
Branch Unspecified
27 Sep 2010

JAVA related problems

Hi everyone,
I am learning JAVA these daz...My teacher is teaching me Applets these daz..Its quite interesting.
As I said I found Applets interesting,I was trying to create a web page but I don't know how to increase the font size of a Label...Can anyone help me out??
sravik

sravik

Branch Unspecified
12 years ago
hi dere !

i saw ur problem, i can help u out..dont worry bout tat.

ok to increase ur font size u need to use a method named setFont().

setFont() method takes Font class object as argument. think little bit confusing rite..dont worry i will let u know by an example..

consider

Label l = new Label("Neha");

Font f = new Font("verdana", Font.BOLD, 40);

l.setFont(f);
add(l);


now dis will help u 2 hav a label of size 40, bold with verdana font.

ok tats it. i think now it will b clear 4 u..hey as soon as xceute it let me know ok..anyways dis is ravi(sravik) presently in toronto, canada doing my MS.
Neha

Neha

Branch Unspecified
12 years ago
thanx a ton...who needs a tutor wen CE is there!!😉
12 years ago
Way to go CEans! [​IMG]

The Big CE-Dream is coming into reality.

-The Big K-
Neha

Neha

Branch Unspecified
12 years ago
Can you tell me,how to set the font color of Label...wud COLor.red work??
Neha

Neha

Branch Unspecified
12 years ago
I have got the answer to my question..the font color can be set by using setForeground(Color.red)
Neha

Neha

Branch Unspecified
12 years ago
using class object in Label

How can we use the object of class in label?

To make my question more clear, I have defined a class "time" which contains the time counter for 30minutes and I want to use its object in label.
Neha

Neha

Branch Unspecified
12 years ago
JTable...

I wanna enter data in JTable in a specific row and column.

Any help??
sravik

sravik

Branch Unspecified
12 years ago
inserting data at specific rows and columns

hi dere !

here is an example for your query. just have a look at this sample code.

JTable t = new JTable(5,5); // creates table with 5 rows and 5 columns

t.setValueAt(10,2,2); // set value 10 at 2nd row and 2nd column.

do remember that the table is like two dimensional array. i mean 2 say that the rows and columns start at 0,0 and ends at m-1, n-1.

setValueAt(Object, rows, columns).. hav a look at the parameters.
hope you can implement it now.
Neha

Neha

Branch Unspecified
12 years ago
Thanx!!

Can u tell me how can I color a specific cell i.e. 3*3 table in a 9*9 table and how can we resize an image?


Thanx in advance😉
sravik

sravik

Branch Unspecified
12 years ago
about table 😀

hi dere !

ur class should extend DefaultTableCellRenderer and use the method

public Component getDefaultTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean focus, int row, int col) method.

here is an example. dis example takes the the table , the vavle, the row, column and checks whether the row is 3 and column is 3. if this condition is true the cell background color is set to red. the concept of CellRenderer is very very important.

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

public class CustomTableCellRenderer extends DefaultTableCellRenderer
{
public Component getTableCellRendererComponent
(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column)
{
Component cell = super.getTableCellRendererComponent
(table, value, isSelected, hasFocus, row, column);

if( row==3 && column==3)
cell.setBackground(Color.red);
return cell;

}
}
sravik

sravik

Branch Unspecified
12 years ago
resizing image 😀

hi dere !

this is regarding resizing the image.

ok, you can use getScaledInstance method present the java.awt.Image .

the syntax is

public Image getScaledInstance(itn width, int height, int hints);

this method creates a scaled version of the your image into new Image object.

hope now you can use this method for resizing.

Happy Programming
Neha

Neha

Branch Unspecified
12 years ago
Thanx Sravik.

I'll try it out.
Neha

Neha

Branch Unspecified
12 years ago
Re: about table 😀

sravik
hi dere !

ur class should extend DefaultTableCellRenderer and use the method

public Component getDefaultTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean focus, int row, int col) method.

here is an example. dis example takes the the table , the vavle, the row, column and checks whether the row is 3 and column is 3. if this condition is true the cell background color is set to red. the concept of CellRenderer is very very important.

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

public class CustomTableCellRenderer extends DefaultTableCellRenderer
{
public Component getTableCellRendererComponent
(JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column)
{
Component cell = super.getTableCellRendererComponent
(table, value, isSelected, hasFocus, row, column);

if( row==3 && column==3)
cell.setBackground(Color.red);
return cell;

}
}
My class already extends JFrame, how can I make it to extend DefaultCellRenderer as one class can iextend a single class only?

Reply as soon as possible..
jatin

jatin

Branch Unspecified
12 years ago
hi neha
u know web designing
i know a bit except java can u pls help me to understand java.
i want to start java frm vry basic
pls help
Varsha0802

Varsha0802

Branch Unspecified
8 years ago
hi...........i have a doubt. i want to take an array of integer values as input using command line arguments. how can i do it?
Manish Goyal

Manish Goyal

Computer Science
8 years ago
Hi varsha
Please ask you question in separate thread in computer science section

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