How to prevent repitition in array implementation?

Question

Hi!
i made a program that will display the output of an a multidimensional array into an output line. but i have a problem on how to prevent the output to print the same item..
thank u!
the output of this program will have at least 1 item that is repeated.
for example {1, 2, 3, 4, 1} how to make the program only print out one "1" {1, 2, 3, 4}?
The program output is ({1, 2, 3, 4, 1},}
what i want is ({1, 2, 3, 4}, ).
//compile this first
public class Graph {
this function will convert graph that it get fom GraphToSet.java to set
public static void convert(int[][] a) {
int rows = a.length;
int cols = a[0].length;
System.out.println("Graph in matrix form["+rows+"]["+cols+"] = "); //Displaying the graph in matrix form
for (int i=0; i<rows; i++) {
System.out.print("{");
for (int j=0; j<cols; j++)
System.out.print(" " + a[j] + ",");
System.out.println("},");
System.out.println("\nG=(V,E)");
System.out.print("G=({");
for (int k=0; k<rows; k++)
System.out.print(" "+ a[k][0] + ", "); //retrieving all the vertices from GraphToSet.java
System.out.print("}"); //and print it out
System.out.print(", {");
for (int i=0; i<rows; i++) {
System.out.print("(");
for (int j=0; j<cols; j++) //retrieving all the edges from GraphToSet.java
System.out.print(" " + a[j] + ","); //and print it out
System.out.print(")");
System.out.println("})"); //final output for graph to set
public class GraphToSet {
run GraphToSet to get the output from Graph.java and GraphToJava.java
public static void main(String[] argv) {
int x[][] = {
{ 1, 2 }, //graph are repsented in matrix form
{ 2, 3 },
{ 3, 4 },
{ 4, 1 },
{ 1, 3 },
Graph.convert(x); //convert the graph into matrix by calling the function
//convert() from Graph.java

Answer 1

Hi,
i got solution for ur problem and see /* Start of Modified code */ Comment for new modified code
//compile this first
import java.util.Hashtable;
public class Graph {
this function will convert graph that it get fom GraphToSet.java to set
public static void convert(int[][] a) {
int rows = a.length;
int cols = a[0].length;
System.out.println("Graph in matrix form["+rows+"]["+cols+"] = "); //Displaying the graph in matrix form
for (int i=0; i<rows; i++) {
System.out.print("{");
for (int j=0; j<cols; j++)
System.out.print(" " + a[j] + ",");
System.out.println("},");
System.out.println("\nG=(V,E)");
System.out.print("G=({");
/* Start of Modified Code */
Hashtable num=new Hashtable(); // New Code
String value=""; // New Code
for (int k=0; k<rows; k++)
     value=String.valueOf(k);
num.put(value,value);
for (int k=0; k<rows; k++)
System.out.print(" "+ (String)num.get(String.valueOf(k))+ ", "); //retrieving all the vertices from GraphToSet.java
/* End of Modified Code */
System.out.print("}"); //and print it out
System.out.print(", {");
for (int i=0; i<rows; i++) {
System.out.print("(");
for (int j=0; j<cols; j++) //retrieving all the edges from GraphToSet.java
System.out.print(" " + a[j] + ","); //and print it out
System.out.print(")");
System.out.println("})"); //final output for graph to set
public class GraphToSet {
run GraphToSet to get the output from Graph.java and GraphToJava.java
public static void main(String[] argv) {
int x[][] = {
{ 1, 2 }, //graph are repsented in matrix form
{ 2, 3 },
{ 3, 4 },
{ 4, 1 },
{ 1, 3 },
Graph.convert(x); //convert the graph into matrix by calling the function
//convert() from Graph.java
Regards
Rajendra Prasad Bandi
email : [email protected] , [email protected]