/Java/Java code to compare csv file against a table

Java code to compare csv file against a table

HashMap<String, String> f1 = new HashMap<String, String>();
HashMap<String, String> f2 = new HashMap<String, String>();
// read f1, f2; use PK field as the key
List<String> deleted = new ArrayList<String>();
List<String> updated = new ArrayList<String>();
for(Map.Entry<String, String> entry : f1.keySet()) {
    if(!f2.containsKey(entry.getKey()) {
        deleted.add(entry.getValue());
    } else {
        if(!f2.get(entry.getKey().equals(f1.getValue())) {
            updated.add(f1.getValue());
        }
    }
}
for(String key : f1.keySet()) {
    f2.remove(key);
}
// f2 now contains only "new" rows

Source: stackoverflow.com

Similar codes

0 vote110 views1 answer
Android plain text remove underline
Java
0 vote118 views1 answer
Java to check if its a number scanner
Java
0 vote141 views1 answer
Convert Octal to Binary in java
Java
0 vote128 views1 answer
How does plus works in Java
Java
0 vote129 views2 answers
Print line number java
Java
4 votes137 views3 answers
Java string to uuid
Java
7 votes136 views1 answer
How to remove all whitespace from string java
Java
0 vote137 views1 answer
Eliminar el primer caracter de un string java
Java
0 vote117 views1 answer
Java script find screen size of device
Java
10 votes154 views3 answers
Java string to long
Java