How to check if at the end of String is one or zero?

Question

How can I check whether at the end of a string is 0?

The problem with this code is that the string may contain:

jrp_documento.jrp_doc_001fornecedor|0

My need is to check if at the end of the string is 1or 0.

I identified another problem as well. Like this string is the table name in the database it is necessary to stay equal to table, I give replaceAll there in the 0 hold back 0, but if the string contain 0 he withdraws and is not to withdraw unless the 0 is at the end. What I do?

 public static void main(String[] args) {

    String nomeColuna = null;
    String coluna = null;
    String sampleString = "jrp_documento.jrp_doc_fornecedor|0";

    String[] items = sampleString.split(";");
    List<String> itemList = Arrays.asList(items);

    for(int i = 0; i < itemList.size(); i++){
       coluna = items[i].replaceAll("[|]", "");            
       coluna =  coluna.replaceAll("[.]", "_");
       if(coluna.contains("0")){

           nomeColuna = coluna.replaceAll("0", "");
           System.out.println(nomeColuna);
           System.out.println(" é zero ");

      }else{

        nomeColuna = coluna.replaceAll("1", "");
        System.out.println(nomeColuna);
        System.out.println(" é um ");

      }             
  }

Answer 1

You can use the function String#endsWith:

System.out.println("jrp_jasper.jrp_jas_nome|0".endsWith("0"));      // true
System.out.println("jrp_jasper.jrp_jas_sobrenome|1".endsWith("0")); // false

It is also possible to use the function String#substring:

String sampleString1 = "jrp_jasper.jrp_jas_nome|0";
String sampleString2 = "jrp_jasper.jrp_jas_sobrenome|1";

String ultimo1 = sampleString1.substring(sampleString1.length() - 1);
String ultimo2 = sampleString2.substring(sampleString2.length() - 1);

System.out.println(ultimo1.equals("0")); // true
System.out.println(ultimo2.equals("0")); // false

Editing

I identified another problem as well. Like this string is the name of table in database it is necessary to stay equal to table, I give replaceAll there in 0 if it contains 0, but if the string contains 0 it removes and not to be removed unless the 0 is at the end. What I do?

There is no need to String#replaceAll, the String#replace also works in this case.

Choose one of the above methods to check the end of the string, if the condition you want is satisfied, extract all characters except the last one, below follows a way to do this with the String#substring:

String sampleString = "jrp_jasper.jrp_jas_nome|0;jrp_jasper.jrp_jas_sobrenome|1";
String[] items = sampleString.split(";");

for(String item: items){
    String nomeColuna = item.replace("|", "").replace(".", "_");

    if (nomeColuna.endsWith("0")){
        // Se terminar em 0
        nomeColuna = nomeColuna.substring(0, nomeColuna.length() - 1);
        System.out.println(nomeColuna);
    }
    else if (nomeColuna.endsWith("1")){
        // Se terminar em 1
        System.out.println(nomeColuna);
    }
    else{
        // Não termina em 0 nem 1
        System.out.println(nomeColuna);
    }
}

See demonstração

Answer 2

    String sampleString = "jrp_documento.jrp_doc_fornecedor|0";
    String[] items = sampleString.split(";");
    for(int i = 0; i < items.length; i++){
        if(items[i].charAt(items[i].length()-1) == '0'){
            System.out.println(items[i] + " termina em zero");
        }else{
            System.out.println(items[i] + " nao termina em zero");
        }   
    }

The code above takes the String, isolates the last character with charAt, and check that it is equal to 0.

See on IDEONE.

Answer 3

To check at the end use endsWith, ex:

str.endsWith("0") || str.endsWith("1")