public class Program { public static void main(String[] args) { System.out.println("\n \nPattern 1\n"); { int a,b,c,d,e=5,g; for(a=1;a<=7;a++) System.out.print("*"); System.out.println(); for(b=3;b>=1;b--) { for(c=1 ;c<=b;c++) { if(b%2!=0) System.out.print("@"); else System.out.print("*"); } for(d=5;d>=e;d--) System.out.print(" "); for(g=1;g<=b;g++) { if(b%2!=0) System.out.print("@"); else System.out.print("*"); } System.out.println(); e=e-2; } } System.out.println("\n \nPattern 2\n"); { int a,b=11,c,d,e=11; for(a=1;a<=5;a++) { for(c=1;c<=a;c++) { System.out.print(b+" "); b=b+10; } System.out.println(); e++; b=e; } } System.out.println("\n \nPattern 3\n"); { int a,b,c,d=65; char ch; for(a=1;a<=5;a++) { for(b=1;b<=a;b++) System.out.print(a); for(c=5;c>=a;c--) { ch=(char)(d); System.out.print(ch); } System.out.println(); d++; } } System.out.println("\n \nPattern 4\n"); { int a,c,e,f,j,n=5,i,k=99,m=98,z,u,y,q=1,w; char b,d,g,h,r,t; for(a=97;a<=100;a++) { b=(char)a; System.out.print(b); } for(c=99;c>=97;c--) { d=(char)c; System.out.print(d); } System.out.println(); for(e=1;e<=3;e++) { for(f=97;f<=k;f++) { g=(char)f; System.out.print(g); } for(i=5;i>=n;i--) System.out.print(" "); for(j=k;j>=97;j--) { h=(char)j; System.out.print(h); } System.out.println(); n=n-2; k--; } for(w=1;w<=2;w++) { for(u=97;u<=m;u++) { t=(char)u; System.out.print(t); } for(y=3;y>=q;y--) System.out.print(" "); for(z=m;z>96;z--) { r=(char)z; System.out.print(r); } System.out.println(); m++; q=q+2; } for(a=97;a<=100;a++) { b=(char)a; System.out.print(b); } for(c=99;c>=97;c--) { d=(char)c; System.out.print(d); } } } }

Java Patterns(4)