Convert value in string into hashmap?

Question

I have a string where i have multiple values. The key and value are separated by * and the whole value is separated by $.

Below is the example:

String agf = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";

And now I want to put the value of this into hashmap in key value pair.

Below is the code i was using but didnt work for converting it into hashmap. Please guide.

String agf = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";

String []tmp = StringUtils.split(agf,'*');
for (String v : tmp) {
    String[] t = StringUtils.split(v,'$');
    map.put(t[0], t[1]);
}

Switch * and $ in the arguments to split, then it's going to work. — Sergey Kalinichenko
– Sergey Kalinichenko, Commented Feb 15, 2017 at 13:52

SmashCode · Accepted Answer · 2017-02-15 14:15:50Z

1

import java.util.HashMap;
import java.util.Map;

public class Parse{
    public static void main(String ...args){
        String agf = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";
        String [] split = agf.split("\\$");
        Map<String,String> map = new HashMap<String,String>();
        for(String temp : split){
            String [] tempo = temp.split("\\*");
            map.put(tempo[0],tempo[1]);
        }
        for(String mapkeys : map.keySet()){
            System.out.println(mapkeys+" ::: "+map.get(mapkeys));
        }
    }
}

if you had multiple values for a given key then use this:

public static void main(String ...args){
        String agf = "abc*pqr*gas$sfd*ghn$atr*mnb$tre*fgt";
        String [] split = agf.split("\\$");
        Map<String,String> map = new HashMap<String,String>();
        for(String temp : split){
            String [] tempo = temp.split("\\*");
            StringJoiner sj = new StringJoiner(",");
            for(int i = 1; i < tempo.length;i++){
                sj.add(tempo[i]);
            }
            String value = sj.toString();
            map.put(tempo[0],value);
        }
        for(String mapkeys : map.keySet()){
            System.out.println(mapkeys+" ::: "+map.get(mapkeys));
        }
    }

Hope you found this helpful

edited Feb 15, 2017 at 14:15

answered Feb 15, 2017 at 13:59

SmashCode

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1 Comment

SmashCode Over a year ago

If you had multiple values for given key please do let me know.

Prakash Balodi · Accepted Answer · 2017-02-15 13:54:33Z

1

Looking at your example string, you should be splitting first on $ (to get individual key value pairs) and then on * (to separate key and values)

answered Feb 15, 2017 at 13:54

Prakash Balodi

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Comments

Gag Baghdasarian · Accepted Answer · 2017-02-15 14:10:39Z

0

Switch '*' and '$'.

String agf = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";
String []tmp = StringUtils.split(agf,'$');
for (String v : tmp) {
   String[] t = StringUtils.split(v,'*');
   map.put(t[0], t[1]);
}

answered Feb 15, 2017 at 14:10

Gag Baghdasarian

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Comments

Prakash P · Accepted Answer · 2017-02-15 14:12:03Z

0

Use string.split("//$") and string.split("//*") as regex for your use case.

Full code :

        String str = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";
        String[] entries = str.split("\\$");

        Map<String, String> map = new HashMap<String, String>();

        for (int i=0; i<entries.length; i++) {
            String[] entry = entries[i].split("\\*");
            map.put(entry[0], entry[1]);
        }

        System.out.println("Entries are -> " + map.entrySet());

answered Feb 15, 2017 at 14:12

Prakash P

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Comments

Pavlo Plynko · Accepted Answer · 2017-02-15 14:45:29Z

0

String agf = "abc*pqr$sfd*ghn$atr*mnb$tre*fgt";

\\next array will contain such elements: "abc*pqr", "sfd*ghn", "atr*mnb", "tre*fgt"
String[] pairs = agf.split("\\$");

Map<String, String> map = new HashMap();

for (String pair: pairs) {

    \\in first iteration next array will contain such elements: "abc", "pqr"
    String[] t = pair.split("\\*");

    \\just fill out map with data
    map.put(t[0], t[1]);
}

edited Feb 15, 2017 at 14:45

answered Feb 15, 2017 at 14:12

Pavlo Plynko

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2 Comments

Toby Speight Over a year ago

Whilst this code snippet is welcome, and may provide some help, it would be greatly improved if it included an explanation of how and why this solves the problem. Remember that you are answering the question for readers in the future, not just the person asking now! Please edit your answer to add explanation, and give an indication of what limitations and assumptions apply.

Pavlo Plynko Over a year ago

@nithesh-kumar This is working, when I'm doing System.out.println(map); I have such output: {sfd=ghn, abc=pqr, tre=fgt, atr=mnb}

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