In the first part How to display pyramid patterns in Java - Part1 we have already seen Java programs for displaying some of the pyramid patterns using numbers and special symbols. In this post java programs are provided for some of the other pyramid patterns using numbers.
Java code for number pattern - Pattern 1
1 12 123 1234 12345 123456 12345 1234 123 12 1
For this types of patterns it is simpler to have to separate for loops. One for the increasing part and another for the decreasing part. In each of these loops there will be a nested for loop also.
import java.util.Scanner;
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter highest number for the pattern (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
for(int i = 1; i <= num; i++){
for(int j = 1; j <= i; j++){
System.out.print(j);
}
System.out.println();
}
for(int i = num; i >= 1; i--){
for(int j = 1; j < i; j++){
System.out.print(j);
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 2
1 22 333 4444 55555 666666 55555 4444 333 22 1
import java.util.Scanner;
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter highest number for the pattern (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
for(int i = 1; i <= num; i++){
for(int j = 1; j <= i; j++){
System.out.print(i);
}
System.out.println();
}
for(int i = num ; i >= 1; i--){
for(int j = 1; j < i; j++){
System.out.print(i -1);
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 3
999999999 88888888 7777777 666666 55555 4444 333 22 1 22 333 4444 55555 666666 7777777 88888888 999999999
import java.util.Scanner;
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter highest number for the pattern (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
for(int i = num; i >= 1; i--){
for(int j = 1; j <= i; j++){
System.out.print(i);
}
System.out.println();
}
for(int i = 2 ; i <=num ; i++){
for(int j = 1; j <= i; j++){
System.out.print(i);
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 4
1234567 123456 12345 1234 123 12 1 12 123 1234 12345 123456 1234567
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows in the pyramid (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
for(int i = num; i >= 1; i--){
for(int j = 1; j <= i; j++){
System.out.print(j);
}
System.out.println();
}
for(int i = 2 ; i <=num ; i++){
for(int j = 1; j <= i; j++){
System.out.print(j);
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 5
1234567
123456
12345
1234
123
12
1
12
123
1234
12345
123456
1234567
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows in the pyramid (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
for(int i = num; i >= 1; i--){
for(int j = i; j < num; j++){
System.out.print(" ");
}
for(int j = 1; j <= i; j++){
System.out.print(j);
}
System.out.println();
}
for(int i = 2 ; i <=num ; i++){
for(int j = num; j > i; j--){
System.out.print(" ");
}
for(int j = 1; j <= i; j++){
System.out.print(j);
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 6
1 2 3 4 5 6 7
1 2 3 4 5 6
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5 6 7
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows in the pyramid (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
// upper pyramid
for(int i = num; i >= 1; i--){
for(int j = 1; j <= num-i; j++){
System.out.print(" ");
}
for(int j = 1; j <= i; j++){
System.out.print(j + " ");
}
System.out.println();
}
//lower pyramid
for(int i = 2 ; i <= num ; i++){
for(int j=0; j< num-i; j++){
System.out.print(" ");
}
for(int j = 1; j <= i; j++){
System.out.print(j + " ");
}
System.out.println();
}
}
}
Java code for number pattern - Pattern 7
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
1 2 3 4 5 6
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1
public class PatternsDemo {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows in the pyramid (1-9) - ");
int noOfRows = sc.nextInt();
// calling method
printPattern(noOfRows);
}
private static void printPattern(int num){
//upper pyramid
for(int i = 1; i <= num; i++){
// this loop will print the spaces after which the
// number has to be printed
for(int j = 0; j < num - i; j++){
System.out.print(" ");
}
// this loop will print the number
for(int k = 1; k < i; k++){
System.out.print(k + " ");
}
System.out.println();
}
for(int i = 1; i < num; i++){
// this loop will print the spaces after which the
// number has to be printed
for(int j = 0; j < i; j++){
System.out.print(" ");
}
// this loop will print the number
for(int k = 1; k < num-i; k++){
System.out.print(k + " ");
}
System.out.println();
}
}
}
That's all for this topic How to Display Pyramid Patterns in Java - Part2. If you have any doubt or any suggestions to make please drop a comment. Thanks!
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