How to Make Star Pattern in Java
Creating star patterns in Java is a popular programming exercise for beginners and experienced developers alike. It helps in understanding basic concepts of loops and conditions in programming. In this article, we will discuss various methods to create different star patterns in Java. Let’s dive into the world of star patterns!
1. Simple Star Pattern
The simplest star pattern in Java is the one where a single line of stars is printed. To achieve this, you can use a single for loop with a single print statement. Here’s an example:
“`java
public class StarPattern {
public static void main(String[] args) {
int n = 5;
for (int i = 1; i <= n; i++) {
System.out.print(" ");
}
System.out.println();
}
}
```
This code will print a line of five stars separated by a space.
2. Right-Angled Triangle Star Pattern
A right-angled triangle star pattern is a classic pattern where the number of stars increases with each line. You can achieve this by using two nested loops: one for the number of lines and another for printing stars in each line. Here’s an example:
“`java
public class StarPattern {
public static void main(String[] args) {
int n = 5;
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= i; j++) {
System.out.print(" ");
}
System.out.println();
}
}
}
```
This code will print a right-angled triangle star pattern with five lines.
3. Inverted Right-Angled Triangle Star Pattern
An inverted right-angled triangle star pattern is similar to the right-angled triangle star pattern, but the number of stars decreases with each line. Here’s an example:
“`java
public class StarPattern {
public static void main(String[] args) {
int n = 5;
for (int i = n; i >= 1; i–) {
for (int j = 1; j <= i; j++) {
System.out.print(" ");
}
System.out.println();
}
}
}
```
This code will print an inverted right-angled triangle star pattern with five lines.
4. Diamond Star Pattern
A diamond star pattern is a combination of two right-angled triangle star patterns. To create a diamond pattern, you need to print the right-angled triangle pattern and then the inverted right-angled triangle pattern. Here’s an example:
“`java
public class StarPattern {
public static void main(String[] args) {
int n = 5;
for (int i = 1; i <= n; i++) {
for (int j = i; j < n; j++) {
System.out.print(" ");
}
for (int j = 1; j <= i; j++) {
System.out.print(" ");
}
System.out.println();
}
for (int i = n - 1; i >= 1; i–) {
for (int j = n; j > i; j–) {
System.out.print(” “);
}
for (int j = 1; j <= i; j++) {
System.out.print(" ");
}
System.out.println();
}
}
}
```
This code will print a diamond star pattern with five lines.
5. Pascal’s Triangle Star Pattern
Pascal’s Triangle is a triangular array of binomial coefficients. You can create a Pascal’s Triangle star pattern by using a 2D array and nested loops. Here’s an example:
“`java
public class StarPattern {
public static void main(String[] args) {
int n = 5;
int[][] pascal = new int[n][n];
for (int i = 0; i < n; i++) {
for (int j = 0; j <= i; j++) {
if (j == 0 || i == j) {
pascal[i][j] = 1;
} else {
pascal[i][j] = pascal[i - 1][j - 1] + pascal[i - 1][j];
}
System.out.print(pascal[i][j] + " ");
}
System.out.println();
}
}
}
```
This code will print a Pascal's Triangle star pattern with five lines.
In conclusion, these are some of the ways to create star patterns in Java. By practicing these patterns, you can enhance your programming skills and understand the importance of loops and conditions in Java programming. Happy coding!
