1. Right Triangle Pattern In Java

public class RightTrianglePattern{
	
public static void main(String[] args){
		
int i, j;
int rows = 5;
		
for(i = 1; i<= rows; i++){ // for number of rows
			
for(j = 1; j<=i; ++j){
System.out.print("*"); // this will print the stars
}
System.out.println(); // finally from here it will go to the next line

			
}
}
}

Output:

2. Pyramid Pattern In Java

public class PyramidPattern{

public static void main(String[] args){

int n = 5; // for number of rows
printPyramid(n); // create a local method	
}

public static void printPyramid(int n){

for(int i = 0; i<n; i++){ // to handle the number of spaces

for(int j = n-i; j>1; j--){

System.out.print(" "); // this will print the spaces
}

for(int j = 0; j<=i; j++){
System.out.print("* "); // this will print the stars
}
System.out.println(); // finally from here it will come to the next line
}
}
}

Output:

3. Left Triangle Pattern In Java

public class LeftTrianglePattern{
public static void main(String[] args){
		
for(int i =1; i<=5; i++){ // for number of rows
			
for(int j =1; j<= 5-i+1; j++){
System.out.print(" "); // to handle number of spaces
}
			
for(int j =1; j<=i; j++){
System.out.print("*"); // this will print the stars
}
System.out.println(); // finally from here, it will go the next line			
}
}
}

Output:

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