Write an application that displays triangle patterns serperately, use a GUI to obtain a user input choice a, b, c, or d Use for loops to generate the patterns. When the user inputs the letter the triangle is drawn. Use astericks (*) should be printed by a single statement of theform System.out.print(‘*’); which causes the astericks to print side by side. the triangle should look like this based on the letter inputed 
(Solved Homework): Write an app…
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TrianglePatternTest.java
import java.util.Scanner;
import javax.swing.JOptionPane;
public class TrianglePatternTest {
public static void main(String[] args) {
int n = Integer.parseInt(JOptionPane.showInputDialog(“Enter n value: “));
char ch = JOptionPane.showInputDialog(“Enter the character: “).charAt(0);
for (int i = 1; i < n * 2; i += 2) {
for (int j = 0; j < n * 2 – 1 – i / 2; j++)
System.out.print(” “);
for (int j = 0; j < i; j++)
System.out.print(ch);
System.out.print(“n”);
}
}
}
Output:
