Скачать или смотреть drawing a shape java tutorial 4

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certainly! let's create a tutorial on drawing shapes in java using the `graphics` class, which is part of the java awt (abstract window toolkit). in this tutorial, we will cover the basics of creating a simple java application that draws various shapes like rectangles, ovals, and lines on a window.

tutorial: drawing shapes in java

step 1: setting up the environment

make sure you have java installed on your machine. you can use any ide like eclipse, intellij idea, or even a simple text editor along with the command line to compile and run your java programs.

step 2: create a java class

create a new java file named `shapedrawing.java`.

step 3: extend `jpanel`

to draw shapes, we will create a class that extends `jpanel`. we will override the `paintcomponent` method, where we will perform our drawing.

step 4: write the code

here’s a complete example that demonstrates how to draw several shapes in a java application:



breakdown of the code

1. **imports**: we import necessary classes from `javax.swing` for gui components and `java.awt` for the graphics.

2. **extending jpanel**: our `shapedrawing` class extends `jpanel`, which is a component that can be rendered on a jframe.

3. **paintcomponent method**:
this method is where all the drawing happens.
we call `super.paintcomponent(g)` to ensure proper rendering.
we use `g.setcolor(color)` to set the color for shapes before drawing.
we use various methods like `fillrect`, `drawoval`, `filloval`, `drawline`, and `drawpolygon` to draw shapes.

4. **main method**:
we create a `jframe` to hold our `jpanel`.
we set the size of the jframe and define the default close operation.
finally, we make the frame visible.

step 5: compile and run

to compile and run your program, follow these steps:

1. open your terminal or command prompt.
2. navigate to the directory where your `shapedrawing.java` file is located.
3. compile the program with:

4. run the compiled program with:
...

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