class start { private int n=5; public void pattern1() { System.out.println("pattern 1"); for(int i=1;i<=n;i++) { for(int j=1;j<=i;j++) { System.out.print(j); } System.out.println(""); }System.out.println(""); } public void pattern2() { System.out.println("pattern 2"); for(int i=1;i<=n;i++) { for(int j=4;j>=i;j--) { System.out.print(j); } System.out.println(""); } } public void pattern3() { System.out.println("pattern 3"); for(int i=1;i<=n;i++) { for(int j=1;j<=i;j++) { System.out.print(i+""); } System.out.println(""); } } public void pattern4() { System.out.println("pattern 4"); for(int i=0;i=n-(i-1)&&j<=n+(i-1)) { System.out.print("*"); } else { System.out.print(" "); } } System.out.println(""); } } public void pattern5() { System.out.println("pattern 5"); for(int i=1;i<=n;i++) { for(int j=1;j<=n;j++) { if(i==1||j==1||i==n||j==n) { System.out.print("*"); } else { System.out.print(" "); } } System.out.println(""); } } } public class Program { public static void main(String[] args) { start a=new start(); a.pattern1(); a.pattern2(); a.pattern3(); a.pattern4(); a.pattern5(); } }

java patterns