What is java ?
Java is a general🌎 purpose programming language that is class👨🏫 based ,object-oriented and software platform📡 that runs 🏃on millions of devices. Java is based on C and C++.java is also using to build GUI (graphic user interface ) .
Java GUI
java swing is a GUI widget📟 toolkit 🧰for java. swing is a set of program that provide ability 🦸🏼♀️to create GUI components like buttons🖲️, textfeild⌨, scrollbars🎚 and so on…..Java swing components are platform independent and the components are lightweight📦.
This is what i learn today (09-07-2022)
JFrame class is a type of a container 🚛 which inherits the javax.swing.JFrame class. JFrame works like the main window 🪟 where components like buttons, labels, textfield etc ….are added to create GUI.
In simple terms it is a container that provide a window on the screen.
import javax.swing.JFrame; // to insert frame we need this
public class frame
{
public static void main(String[] args)
{
JFrame frame = new JFrame(); //creating instance of a jframe called frame
frame.setSize(500,500); //seting size of the frame width and height
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //it is used to specify one of the several options for the close button. exit the application when the user closes the window.
frame.setVisible(true); // it makes sceen appear in the screen
}
}
JLabel can display 🖥️ either text, an image or both. Labels 🏷️ are align's by setting 🧑🏾🔧 the verticle and horizontal alignment in its display area
import javax.swing.*; // if we want to add all the componets we can use * symbol to
import java.awt.*;
public class label
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
JLabel label = new JLabel(); //create JLabel instance with no image and with empty string for the title
label.setText("click me"); //returns the text string that label displays
label.setForeground(new Color(0xDC0E0E));
frame.setTitle("java swing");
frame.setBounds(500, 150, 1000, 800); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
frame.setVisible(true);
frame.add(label);
}
}
imageicon is an implementation of the icon⭐ interface that paints icon from image.
Setimageicon method of frame🔲 class is used too change the icon of frame
import javax.swing.JFrame; // to insert frame we need this
import javax.swing.ImageIcon; // importing imageicon
import javax.swing.JLabel;
import java.awt.*; // this is using for changing the color of the font of the label
public class imageicon
{
public static void main(String[] args)
{
JFrame frame = new JFrame();
ImageIcon image =new ImageIcon("image/polygon.jpg"); //C:\Users\ASUS\Downloads\imagejpg // location of the image
JLabel label = new JLabel();
label.setText("image "); // text of the label
label.setIcon(image); //setting the image of the icon of frame or window
//setting position of the image and label
label.setHorizontalTextPosition(JLabel.LEFT); // setting the text position or where the text display, LEFT of the image or RIGHT of the image or CENTER of the imaege
label.setVerticalTextPosition(JLabel.BOTTOM);// setting the text position or where the text display, BOTTOM of the image or TOP of the image
// setting position of the image+label in the frame
label.setHorizontalAlignment(JLabel.SOUTH_EAST); // setting image+label LEFT or RIGHT or CENTER and more ......
label.setVerticalAlignment(JLabel.TOP); //setting image+label TOP or CENTER and more .......
label.setForeground(Color.RED); //seting font color
label.setFont(new Font("Courier new",Font.BOLD,24)); // setting font for text, font style and font size
frame.setSize(500,500); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.add(label);
frame.setIconImage(image.getImage()); // adding icon for the frame or window
}
}
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