Add hashmap in to hashmap as avalue
In the below code, am creating a temp hashmap and adding it as value to another hashmap, at the end of the while loop the csvList hashmap has only the last value of the temp has map that was added as a value, all other values are null
The key is retained and all values are replaced by null.
What am i doing wrong here, is it the temp.clear or where the temp hashmap is declared.
HashMap<String, HashMap<String, String>> csvList = new HashMap<String, HashMap<String, String>>();
HashMap<String, String> tempMap = new HashMap<String, String>();
List<String> line = null;
try {
inputStream = new FileInputStream(csvFile);
//scanner = new Scanner(inputStream);
scanner = new Scanner(inputStream, "UTF-8");
//scanner.useDelimiter("rn");
int i = 0;
while (scanner.hasNext()) {
//tempMap.clear();
if (i == 0) {
headList = parseLine(scanner.nextLine());
i++;
} else {
line = parseLine(scanner.nextLine());
pKey = "";
for (int j = 0; j < line.size(); j++) {
if (!selectClause.toLowerCase().contains(headList.get(j).toLowerCase()))
continue;
else {
// Change for multiple PKeys
if (primaryKey.toLowerCase().contains(headList.get(j).toLowerCase())) {
pKey = pKey + line.get(j);
}
if (headList.get(j).equalsIgnoreCase(primaryKey))
pKey = line.get(j);
tempMap.put(headList.get(j).toLowerCase(), line.get(j));
}
}
//System.out.println(i++);
line.clear();
csvList.put(pKey, tempMap);
}
//tempMap.clear();
}
headList.clear();
//tempMap.clear();
scanner.close();
}
return csvList;
}
java hashmap
edited Nov 27 '18 at 12:34
Rakesh
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
add a comment |
In the below code, am creating a temp hashmap and adding it as value to another hashmap, at the end of the while loop the csvList hashmap has only the last value of the temp has map that was added as a value, all other values are null
The key is retained and all values are replaced by null.
What am i doing wrong here, is it the temp.clear or where the temp hashmap is declared.
HashMap<String, HashMap<String, String>> csvList = new HashMap<String, HashMap<String, String>>();
HashMap<String, String> tempMap = new HashMap<String, String>();
List<String> line = null;
try {
inputStream = new FileInputStream(csvFile);
//scanner = new Scanner(inputStream);
scanner = new Scanner(inputStream, "UTF-8");
//scanner.useDelimiter("rn");
int i = 0;
while (scanner.hasNext()) {
//tempMap.clear();
if (i == 0) {
headList = parseLine(scanner.nextLine());
i++;
} else {
line = parseLine(scanner.nextLine());
pKey = "";
for (int j = 0; j < line.size(); j++) {
if (!selectClause.toLowerCase().contains(headList.get(j).toLowerCase()))
continue;
else {
// Change for multiple PKeys
if (primaryKey.toLowerCase().contains(headList.get(j).toLowerCase())) {
pKey = pKey + line.get(j);
}
if (headList.get(j).equalsIgnoreCase(primaryKey))
pKey = line.get(j);
tempMap.put(headList.get(j).toLowerCase(), line.get(j));
}
}
//System.out.println(i++);
line.clear();
csvList.put(pKey, tempMap);
}
//tempMap.clear();
}
headList.clear();
//tempMap.clear();
scanner.close();
}
return csvList;
}
java hashmap
edited Nov 27 '18 at 12:34
Rakesh
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
add a comment |
In the below code, am creating a temp hashmap and adding it as value to another hashmap, at the end of the while loop the csvList hashmap has only the last value of the temp has map that was added as a value, all other values are null
The key is retained and all values are replaced by null.
What am i doing wrong here, is it the temp.clear or where the temp hashmap is declared.
HashMap<String, HashMap<String, String>> csvList = new HashMap<String, HashMap<String, String>>();
HashMap<String, String> tempMap = new HashMap<String, String>();
List<String> line = null;
try {
inputStream = new FileInputStream(csvFile);
//scanner = new Scanner(inputStream);
scanner = new Scanner(inputStream, "UTF-8");
//scanner.useDelimiter("rn");
int i = 0;
while (scanner.hasNext()) {
//tempMap.clear();
if (i == 0) {
headList = parseLine(scanner.nextLine());
i++;
} else {
line = parseLine(scanner.nextLine());
pKey = "";
for (int j = 0; j < line.size(); j++) {
if (!selectClause.toLowerCase().contains(headList.get(j).toLowerCase()))
continue;
else {
// Change for multiple PKeys
if (primaryKey.toLowerCase().contains(headList.get(j).toLowerCase())) {
pKey = pKey + line.get(j);
}
if (headList.get(j).equalsIgnoreCase(primaryKey))
pKey = line.get(j);
tempMap.put(headList.get(j).toLowerCase(), line.get(j));
}
}
//System.out.println(i++);
line.clear();
csvList.put(pKey, tempMap);
}
//tempMap.clear();
}
headList.clear();
//tempMap.clear();
scanner.close();
}
return csvList;
}
java hashmap
edited Nov 27 '18 at 12:34
Rakesh
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
In the below code, am creating a temp hashmap and adding it as value to another hashmap, at the end of the while loop the csvList hashmap has only the last value of the temp has map that was added as a value, all other values are null
The key is retained and all values are replaced by null.
What am i doing wrong here, is it the temp.clear or where the temp hashmap is declared.
HashMap<String, HashMap<String, String>> csvList = new HashMap<String, HashMap<String, String>>();
HashMap<String, String> tempMap = new HashMap<String, String>();
List<String> line = null;
try {
inputStream = new FileInputStream(csvFile);
//scanner = new Scanner(inputStream);
scanner = new Scanner(inputStream, "UTF-8");
//scanner.useDelimiter("rn");
int i = 0;
while (scanner.hasNext()) {
//tempMap.clear();
if (i == 0) {
headList = parseLine(scanner.nextLine());
i++;
} else {
line = parseLine(scanner.nextLine());
pKey = "";
for (int j = 0; j < line.size(); j++) {
if (!selectClause.toLowerCase().contains(headList.get(j).toLowerCase()))
continue;
else {
// Change for multiple PKeys
if (primaryKey.toLowerCase().contains(headList.get(j).toLowerCase())) {
pKey = pKey + line.get(j);
}
if (headList.get(j).equalsIgnoreCase(primaryKey))
pKey = line.get(j);
tempMap.put(headList.get(j).toLowerCase(), line.get(j));
}
}
//System.out.println(i++);
line.clear();
csvList.put(pKey, tempMap);
}
//tempMap.clear();
}
headList.clear();
//tempMap.clear();
scanner.close();
}
return csvList;
}
java hashmap
java hashmap
edited Nov 27 '18 at 12:34
Rakesh
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
edited Nov 27 '18 at 12:34
Rakesh
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
edited Nov 27 '18 at 12:34
Rakesh
9241617
edited Nov 27 '18 at 12:34
Rakesh
9241617
edited Nov 27 '18 at 12:34
Rakesh
9241617
9241617
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
asked Nov 27 '18 at 12:20
Divya NeelaiahDivya Neelaiah
2915
2915
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
You create the tempMap outside the while loop so it is the same instance you use all the time, move the creation inside the loop so each pKey in the csvList gets a unique instance
while (scanner.hasNext()) {
HashMap<String, String> tempMap = new HashMap<String, String>();
...
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You create the tempMap outside the while loop so it is the same instance you use all the time, move the creation inside the loop so each pKey in the csvList gets a unique instance
while (scanner.hasNext()) {
HashMap<String, String> tempMap = new HashMap<String, String>();
...
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
add a comment |
You create the tempMap outside the while loop so it is the same instance you use all the time, move the creation inside the loop so each pKey in the csvList gets a unique instance
while (scanner.hasNext()) {
HashMap<String, String> tempMap = new HashMap<String, String>();
...
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
add a comment |
You create the tempMap outside the while loop so it is the same instance you use all the time, move the creation inside the loop so each pKey in the csvList gets a unique instance
while (scanner.hasNext()) {
HashMap<String, String> tempMap = new HashMap<String, String>();
...
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
You create the tempMap outside the while loop so it is the same instance you use all the time, move the creation inside the loop so each pKey in the csvList gets a unique instance
while (scanner.hasNext()) {
HashMap<String, String> tempMap = new HashMap<String, String>();
...
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
answered Nov 27 '18 at 12:43
Joakim DanielsonJoakim Danielson
9,3573724
9,3573724
add a comment |
add a comment |
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