AS400ZonedDecimal converter = new AS400ZonedDecimal(3, 0);
byte[] convertedBytesArray = converter.toBytes(new BigDecimal("-120"));
I can get characters ’12}’ from byte array, and that’s right.
but when I try to use BigDecimal(“120”) to convert,
then I got characters ‘120’ but I want to get ’12{‘.
How to use AS400ZonedDecimal to convert BigDecimal positive to EBCDIC with sign ?
I try to search AS400ZonedDecimal API but no luck.
3
Main.java
package org.example;
import com.ibm.as400.access.AS400ZonedDecimal;
import java.math.BigDecimal;
import java.nio.charset.Charset;
public class Main {
// EBCDIC charset (IBM037)
static Charset ebcdicCharset = Charset.forName("IBM037");
public static void showEBCDICHexVal(byte[] bytes){
for (byte b : bytes) {
// Convert byte to hexadecimal string
String hexValue = String.format("%02X", b);
// Convert byte to EBCDIC character
String ebcdicChar = new String(new byte[]{b}, ebcdicCharset);
System.out.printf("Hex: %s, EBCDIC: %s%n", hexValue, ebcdicChar);
}
}
public static void main(String[] args) {
//BigDecimal nNum = new BigDecimal("-120");
BigDecimal nNum = new BigDecimal("120");
AS400ZonedDecimal converter = new AS400ZonedDecimal(3, 0);
byte[] nNumBytesArray = converter.toBytes(nNum);
// Display byte array in hexadecimal and EBCDIC decoded characters
System.out.println("Hexadecimal and EBCDIC Representation:");
showEBCDICHexVal(nNumBytesArray);
} //main
} //class
Get 120 , output
120
Hex: F1, EBCDIC: 1
Hex: F2, EBCDIC: 2
Hex: F0, EBCDIC: 0
Not expected 12{
Main2.java
package org.example;
import java.math.BigDecimal;
import com.ibm.as400.access.AS400ZonedDecimal;
import java.nio.charset.Charset;
public class Main2 {
// EBCDIC charset (IBM037)
static Charset ebcdicCharset = Charset.forName("IBM037");
public static void showEBCDICHexVal(byte[] bytes){
for (byte b : bytes) {
// Convert byte to hexadecimal string
String hexValue = String.format("%02X", b);
// Convert byte to EBCDIC character
String ebcdicChar = new String(new byte[]{b}, ebcdicCharset);
System.out.printf("Hex: %s, EBCDIC: %s%n", hexValue, ebcdicChar);
}
}
public static void main(String[] args) throws Exception {
// EBCDIC string "12}" representing the zoned decimal encoded -120
//String ebcdicString = "12}";
String ebcdicString = "12{";
// EBCDIC charset (IBM037)
Charset ebcdicCharset = Charset.forName("IBM037");
// Convert the string to EBCDIC byte array
byte[] ebcdicBytes = ebcdicString.getBytes(ebcdicCharset);
showEBCDICHexVal(ebcdicBytes);
// Interpret the byte array as a zoned decimal to convert it back to BigDecimal
// AS400ZonedDecimal takes length and scale, here length is 3 (for 3 digits) and scale is 0 (no decimal places)
AS400ZonedDecimal converter = new AS400ZonedDecimal(3, 0);
// Convert byte array to BigDecimal
BigDecimal result = (BigDecimal) converter.toObject(ebcdicBytes);
// Print the result
System.out.println("Converted BigDecimal: " + result);
}
}
Input 12{ get 120
Hex: F1, EBCDIC: 1
Hex: F2, EBCDIC: 2
Hex: C0, EBCDIC: {
Converted BigDecimal: 120
compare
Hex: F1, EBCDIC: 1 | Hex: F1, EBCDIC: 1
Hex: F2, EBCDIC: 2 | Hex: F2, EBCDIC: 2
Hex: F0, EBCDIC: 0 | Hex: C0, EBCDIC: {
if input positive number, you must change FX to CX.
(X is 0,1,3,4,5,6,7,8,9)
hard code rule:
modify the last element of the byte array.
You can do it yourself.
Hex value F0 to C0, F1 to C1,…..
- Hex:
F0->C0, EBCDIC:0->{ - Hex:
F1->C1, EBCDIC:1-> …
You can use put your string (12{) into Main2.java get output BigDecimal (120) to verify your encode string.
** Hard code test**
Main2.java
//byte[] ebcdicBytes = ebcdicString.getBytes(ebcdicCharset);
byte[] ebcdicBytes = {(byte)0xF1, (byte)0xF2, (byte)0xC1};
12A -> 121
Hex: F1, EBCDIC: 1
Hex: F2, EBCDIC: 2
Hex: C1, EBCDIC: A
Converted BigDecimal: 121
// Custom method to convert BigDecimal to EBCDIC Zoned Decimal format
public static byte[] convertToZonedDecimal(BigDecimal number) {
// Convert the BigDecimal to string representation
String numStr = number.abs().toPlainString();
int length = numStr.length();
// Create a byte array for the EBCDIC zoned decimal
byte[] ebcdicBytes = new byte[length];
// Fill the byte array with EBCDIC values for the digits
for (int i = 0; i < length - 1; i++) {
ebcdicBytes[i] = (byte) (0xF0 + (numStr.charAt(i) - '0'));
}
// Handle the last byte with the appropriate sign
char lastChar = numStr.charAt(length - 1);
if (number.signum() >= 0) {
// Positive: Convert last digit with positive sign encoding
ebcdicBytes[length - 1] = (byte) (0xC0 + (lastChar - '0')); // Positive sign -> C0, C1, ..., C9
} else {
// Negative: Convert last digit with negative sign encoding
ebcdicBytes[length - 1] = (byte) (0xD0 + (lastChar - '0')); // Negative sign -> D0, D1, ..., D9
}
return ebcdicBytes;
}
Your Code:
byte[] convertedBytesArray = converter.toBytes(new BigDecimal("-120"));
Use convertToZonedDecimal code:
byte[] convertedBytesArray = convertToZonedDecimal(new BigDecimal("-120"));
Final Answer:
Main.java
package org.example;
import com.ibm.as400.access.AS400ZonedDecimal;
import java.math.BigDecimal;
import java.nio.charset.Charset;
public class Main {
// EBCDIC charset (IBM037)
static Charset ebcdicCharset = Charset.forName("IBM037");
// Custom method to convert BigDecimal to EBCDIC Zoned Decimal format
public static byte[] convertToZonedDecimal(BigDecimal number) {
// Convert the BigDecimal to string representation
String numStr = number.abs().toPlainString();
int length = numStr.length();
// Create a byte array for the EBCDIC zoned decimal
byte[] ebcdicBytes = new byte[length];
// Fill the byte array with EBCDIC values for the digits
for (int i = 0; i < length - 1; i++) {
ebcdicBytes[i] = (byte) (0xF0 + (numStr.charAt(i) - '0'));
}
// Handle the last byte with the appropriate sign
char lastChar = numStr.charAt(length - 1);
if (number.signum() >= 0) {
// Positive: Convert last digit with positive sign encoding
ebcdicBytes[length - 1] = (byte) (0xC0 + (lastChar - '0')); // Positive sign -> C0, C1, ..., C9
} else {
// Negative: Convert last digit with negative sign encoding
ebcdicBytes[length - 1] = (byte) (0xD0 + (lastChar - '0')); // Negative sign -> D0, D1, ..., D9
}
return ebcdicBytes;
}
public static void showEBCDICHexVal(byte[] bytes){
for (byte b : bytes) {
// Convert byte to hexadecimal string
String hexValue = String.format("%02X", b);
// Convert byte to EBCDIC character
String ebcdicChar = new String(new byte[]{b}, ebcdicCharset);
System.out.printf("Hex: %s, EBCDIC: %s%n", hexValue, ebcdicChar);
}
}
public static void main(String[] args) {
BigDecimal nNum = new BigDecimal("121");
//AS400ZonedDecimal converter = new AS400ZonedDecimal(3, 0);
//byte[] nNumBytesArray = converter.toBytes(nNum);
byte[] nNumBytesArray = convertToZonedDecimal(nNum);
// Display byte array in hexadecimal and EBCDIC decoded characters
System.out.println("Hexadecimal and EBCDIC Representation:");
showEBCDICHexVal(nNumBytesArray);
} //main
} //class