Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:## JAVA Triangle Program Tutorial
### Overview
This tutorial guides you through writing a JAVA program that reads the height of a triangle (less than 10) from the user. It then calls two void methods named `plotTri1` and `plotTri2`. These methods print triangles of numbers, which are left-aligned.
### Instructions
1. **Project Setup:**
- Create a project and class named `HW8FirstnameLastname` in NetBeans, replacing `Firstname` and `Lastname` with your actual name.
2. **Method Description:**
- Both `plotTri1` and `plotTri2` methods should take a parameter for the triangle's height and use `printf` inside nested For loops.
- The output should produce triangles with the specified height.
3. **Example:**
- For height = 8, the methods `plotTri1` and `plotTri2` will print the following:
#### `plotTri1` Output
```
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
```
#### `plotTri2` Output
```
1
2 1 2
4 2 1 2 4
8 4 2 1 2 4 8
16 8 4 2 1 2 4 8 16
32 16 8 4 2 1 2 4 8 16 32
64 32 16 8 4 2 1 2 4 8 16 32 64
128 64 32 16 8 4 2 1 2 4 8 16 32 64 128
```
### Explanation of the Triangles
- **`plotTri1`:** This triangle mirrors Pascal's Triangle, where each number is
Transcribed Image Text:**Creating Triangles Using Java in NetBeans**
In this exercise, you will create a project and class named `HW8FirstnameLastname` in NetBeans, replacing "FirstnameLastname" with your actual first and last names. The task involves programming code to display two distinct triangular patterns using numbers.
### Task Details
For a given height of 8, the functions `plotTri1` and `plotTri2` will generate and print two triangles as follows:
**Triangle Pattern 1 (`plotTri1`):**
This pattern displays Pascal's Triangle aligned to the left. Each subsequent row shows the binomial coefficients for that particular number:
```
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
1 6 15 20 15 6 1
1 7 21 35 35 21 7 1
```
**Triangle Pattern 2 (`plotTri2`):**
This pattern also shows a numerical series, similar to Pascal's Triangle, but aligned to the right:
```
1
1 1
1 2 1
1 4 6 4 1
1 8 16 32 16 8 1
1 16 32 64 128 64 32 16 1
1 32 64 128 256 256 128 64 32 1
```
### Instructions
1. **Set Up the Project:**
- Open NetBeans and create a new project.
- Name the project and class as described, replacing "FirstnameLastname" with your actual names.
2. **Implement the Plot Functions:**
- Write a method `plotTri1()` to print the first triangle using nested loops.
- Write another method `plotTri2()` to print the second triangle, ensuring proper alignment.
### Learning Outcomes
- Understand how to use loops to generate complex patterns.
- Familiarize yourself with Pascal’s Triangle and the concept of binomial coefficients.
- Gain experience in formatting output for better readability and presentation in code.
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