JAVA related problems

Replies

• 

  sravik

  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

  thanx a ton...who needs a tutor wen CE is there!!😉
• 

  Kaustubh Katdare

  Way to go CEans!
  
  The Big CE-Dream is coming into reality.
  
  -The Big K-
• 

  Neha

  Can you tell me,how to set the font color of Label...wud COLor.red work??
• 

  Neha

  I have got the answer to my question..the font color can be set by using setForeground(Color.red)
• 

  Neha

  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

  JTable...
  
  I wanna enter data in JTable in a specific row and column.
  
  Any help??
• 

  sravik

  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

  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

  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

  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

  Thanx Sravik.
  
  I'll try it out.
• 

  Neha

  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

  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

  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

  Hi varsha
  Please ask you question in separate thread in computer science section