Today I am going to explain you some pattern program in Java.
Que 1: Write a program to print isosceles triangle in Java?
public class PrintIsocscelesTriangle {
public static void main(String[] args) {
int row, col, space;
for(row = 1; row <= 20; row+=2)
{
for(space=18; space >= row; space-=2)
{
System.out.print(' ');
}
for(col = 1; col <=(row); col++ )
{
System.out.print("*");
}
System.out.println("");
}
}
}
Output:
*
***
*****
*******
*********
***********
*************
***************
*****************
*******************
Que 2: Write a program to print the below pattern in Java?
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
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10
public class Pattern1 {
public static void main( String arg[]){
int i,j;
for( i=1;i<=10;i++){
for( j=1;j<=i;j++){
System.out.print(j+" ");
}
System.out.println();
}
}
}
Que 3: Write a program to print the below pattern in Java?
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8
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
public class Pattern2 {
public static void main(String[] args) {
int i,j;
for( i=10;i>=1;i--){
for(j=1;j<=i;j++){
System.out.print(j + " ");
}
System.out.println(); }
}
}
Que 4: Write a program to print the below pattern in Java?
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
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8
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
public class Pattern3 {
public static void main(String[] args) {
int i,j;
for( i=1;i<=10;i++){
for( j=1;j<=i;j++){
System.out.print(j+" ");
}
System.out.println();
}
for( i=9;i>=1;i--){
for(j=1;j<=i;j++){
System.out.print(j + " ");
}
System.out.println();
}
}
}
Que 5: Write a program to print the below pattern in Java?
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8
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
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
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10
public class Pattern3 {
public static void main(String[] args) {
int i,j;
for( i=10;i>=1;i--){
for(j=1;j<=i;j++){
System.out.print(j + " ");
}
System.out.println(); }
for( i=1;i<=10;i++){
for( j=1;j<=i;j++){
System.out.print(j+" ");
}
System.out.println();
}
}
}
Que 6: Write a program to print the below pattern in Java?
*********
*******
*****
***
*
public class Pattern4 {
public static void main(String[] args) {
int n=5;
for(int i=1;i<=n;i++){
for(int j=i;j>1;j--){
System.out.print(" ");
}
for(int k=1;k<=n-(i-1);k++){
System.out.print("*");
for(int k1=1;k1<k;k1+=k){
System.out.print("*");
}
}
System.out.println();
}
}
}
Que 7: Write a program to print the below pattern in Java?
*
***
*****
*******
*********
*********
*******
*****
***
*
public class Pattern4 {
public static void main(String[] args) {
int n=5;
for(int i=n;i>=1;i--){
for(int j=i;j>1;j--){
System.out.print(" ");
}
for(int k=1;k<=n-(i-1);k++){
System.out.print("*");
for(int k1=1;k1<k;k1+=k){
System.out.print("*");
}
}
System.out.println();
}
for(int i=1;i<=n;i++){
for(int j=i;j>1;j--){
System.out.print(" ");
}
for(int k=1;k<=n-(i-1);k++){
System.out.print("*");
for(int k1=1;k1<k;k1+=k){
System.out.print("*");
}
}
System.out.println();
}
}
}
Note: If you have any problem then just drop me a comment.
1 Comments
Well, these with numbers appear to be pretty easy, but I stuck on those with symbols. If I get this clear, is it sort of common questions for Java Dev job interviews? I'm new-new to Java, have started just several months ago with some online courses, but it went out pointless to me, because they're too much rapid. Now I stand with this resource in order to get to know all the basics of java core more details you may see here. Now I have enough confidence in order to write simple solutions and programs by the book, but some practice is required in order to sort out questions like these with any manuals
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