Is there any method in java to know size of decimal??
I mean 14 has 2 digits , 100 has 3 etc.......
I m going to implement auto generated number like
A0001 , now i want to change it on each new entry , so Does any one has any great idea???
Auto generated number length remain fix...
are meaning
A&14 == A00014
A&150 == A00150
don't do it that, that really stupid idea,
subString() or String.format
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class GenerateProgresId {
private static String[] aChar = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J",
"K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};
private static List<String> listA;
public GenerateProgresId() {
List<Number> list3 = new ArrayList<Number>();
List<Integer> list4 = new ArrayList<Integer>();
List<? extends Number> list5 = new ArrayList<Integer>();
List<? extends Number> list6 = list4;
list3.add(Integer.valueOf(333));
list4.add(Integer.valueOf(444));
//list5.add(Integer.valueOf(555)); // compile error
//list6.add(Integer.valueOf(666)); // compile error
Number n3 = list3.get(0);
Integer i4 = list4.get(0);
Number n5 = !list5.isEmpty() ? list5.get(0) : null;
Number n6 = list6.get(0);
System.out.printf("%s, %s, %s, %s%n", n3, i4, n5, n6);
int pomocInt = 1;
String pomocStr = "";
if (pomocInt < 10) {
pomocStr = "0" + pomocInt;
} else if (pomocInt < 100) {
pomocStr = String.valueOf(pomocInt);
} else {
pomocStr = String.valueOf(pomocInt);
}
System.out.println(pomocStr);
pomocInt = 12;
pomocStr = "";
if (pomocInt < 10) {
pomocStr = "0" + pomocInt;
} else if (pomocInt < 100) {
pomocStr = String.valueOf(pomocInt);
} else {
pomocStr = String.valueOf(pomocInt);
}
System.out.println(pomocStr);
pomocInt = 157;
pomocStr = "";
if (pomocInt < 10) {
pomocStr = "0" + pomocInt;
} else if (pomocInt < 100) {
pomocStr = String.valueOf(pomocInt);
} else if (pomocInt > 99) {
pomocStr = String.valueOf(pomocInt);
pomocStr = pomocStr.substring(pomocStr.length() - 2, pomocStr.length());
}
System.out.println(pomocStr);
listA = new ArrayList<String>();
listA.addAll(Arrays.asList(aChar));
System.out.println("From List");
System.out.println(GenerateProgresIdList(null));
System.out.println(GenerateProgresIdList(""));
System.out.println(GenerateProgresIdList("B"));
System.out.println(GenerateProgresIdList("AA"));
System.out.println(GenerateProgresIdList("AZ"));
System.out.println(GenerateProgresIdList("ZY"));
System.out.println(GenerateProgresIdList("ZZ"));
System.out.println("From String[]");
System.out.println(GenerateProgresIdString(null));
System.out.println(GenerateProgresIdString(""));
System.out.println(GenerateProgresIdString("B"));
System.out.println(GenerateProgresIdString("AA"));
System.out.println(GenerateProgresIdString("AZ"));
System.out.println(GenerateProgresIdString("ZY"));
System.out.println(GenerateProgresIdString("ZZ"));
}
public static String GenerateProgresIdList(String str) {
int lastChar = aChar.length - 1;
String retStr = "AA";
if (str != null) {
if (str.length() > 0) {
if (str.length() == 1) {
retStr = str + aChar[0];
} else if (str.length() == 2) {
int stChar = listA.indexOf(str.substring(0, 1));
int ndChar = listA.indexOf(str.substring(1, str.length()));
if ((stChar != lastChar) || (ndChar != lastChar)) {
if (ndChar == lastChar) {
retStr = listA.get(stChar + 1) + listA.get(0);
} else {
retStr = listA.get(stChar) + listA.get(ndChar + 1);
}
}
}
}
}
return retStr;
}
public static String GenerateProgresIdString(String str) {
String lastChar = aChar[aChar.length - 1];
String retStr = "AA";
if (str != null) {
if (str.length() > 0) {
if (str.length() == 1) {
retStr = str + aChar[0];
} else if (str.length() == 2) {
if ((!str.substring(0, 1).equals(lastChar)) || (!str.substring(1, str.length()).equals(lastChar))) {
String pos1 = str.substring(0, 1);
String pos2 = str.substring(1, str.length());
if ((pos2).equals(lastChar)) {
int heplInt = 0;
for (int i = 0; i < aChar.length; i++) {
if (aChar[i].equals(pos1)) {
heplInt = i + 1;
break;
}
}
retStr = aChar[heplInt] + aChar[0];
} else {
int heplInt = 0;
for (int i = 0; i < aChar.length; i++) {
if (aChar[i].equals(pos2)) {
heplInt = i + 1;
break;
}
}
retStr = pos1 + aChar[heplInt];
}
}
}
}
}
return retStr;
}
public static void main(String[] args) {
GenerateProgresId gpi = new GenerateProgresId();
}
}number length remain fix
Look at the String format method.
Well @mKorbel i didnt thought that way too.... :) I have developed a easy algorithem to do it without extra work. Clean and clear code....
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