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Displaying Graphics in Applet

We can use java.awt.Graphics class to draw shapes, lines, and text onto Java applets in order to display graphics.
Here's a more detailed explanation of the steps involved

Drawing shapes : Once you have a Graphics object, you can draw shapes on the applet using its methods. Draw a circle using the fillOval() method and a rectangle using the drawRect() method, for instance. Here is an example of how to draw a circle and a rectangle.
```
public void paint(Graphics g) {
    Graphics graphics = getGraphics();
    graphics.drawRect(10, 10, 50, 50);
    graphics.fillOval(70, 10, 50, 50);
}
```
In this example, The drawRect() method is used in this example to draw a rectangle with the top-left corner at (10, 10) and width and height set to 50. The fillOval() method is used to draw a circle with a diameter of 50 and a centre at (70, 35).

Drawing lines : You can draw lines in the Graphics class in addition to shapes. To draw a line connecting two points, use the drawLine() method. Here is a sample of a line that was drawn.
```
public void paint(Graphics g) {
    Graphics graphics = getGraphics();
    graphics.drawLine(10, 70, 110, 70);
}
```
In this example, the drawLine() method is used to draw a line between the points (10, 70) and (110, 70).

Drawing text : Finally, you can draw text on the applet using the Graphics class. To draw a string of text at a specific location, use the drawString() method. This is an illustration of how to draw text.
```
public void paint(Graphics g) {
    Graphics graphics = getGraphics();
    graphics.drawString("Hello, world!", 10, 100);
}
```
In this example, the drawString() method is used to draw the string "Hello, world!" at the point (10, 100).

It's important to remember that the whenever paint() method is called the applet needs to be redrawn, which can be quite frequently. As a result, it's crucial to ensure that your paint() method is effective and doesn't perform any extraneous tasks. For instance, instead of drawing a static image repeatedly as the applet is painted, you should think about drawing it once and saving it in an Image object.

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