ASCII to IBM 1047 EBCDIC Go mapping table generator

ebcdic.java

import org.jpos.iso.ISOUtil;
import sun.nio.cs.ext.IBM1047;
import sun.nio.cs.ext.IBM1140;

import java.awt.event.KeyEvent;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;

/**
 * Created by richard on 10/11/2016.
 */
public class Foo {
    public static void main(String [] args) {
    ibm1047();
    }

    public static void ibm1047() {
        IBM1047 cp = new IBM1047();

        System.out.println(String.format("ASCII to EBCDIC"));
        for (int i = 0; i <= 255; i++) {
            byte[] x = new byte[]{(byte)i};
            CharBuffer cb = cp.decode(ByteBuffer.wrap(x));
            char c = cb.array()[0];
            if (isPrintableChar(c)) {
                System.out.println(String.format("'%c': 0x%02X,", c, x[0]));
            } else {
                System.out.println(String.format("'\\u%04X': 0x%02X,", (int)c, x[0]));
            }
        }

        System.out.println(String.format("EBCDIC to ASCII"));
        for (int i = 0; i <= 255; i++) {
            byte[] x = new byte[]{(byte)i};
            CharBuffer cb = cp.decode(ByteBuffer.wrap(x));
            char c = cb.array()[0];
            if (isPrintableChar(c)) {
                System.out.println(String.format("0x%02X: '%c',", i, c));
            } else {
                System.out.println(String.format("0x%02X: '\\u%04X',", i, (int)c));
            }

        }
    }

    public static void ibm1140() {
        IBM1140 cp = new IBM1140();

        System.out.println(String.format("ASCII to EBCDIC"));
        for (int i = 0; i <= 255; i++) {
            byte[] x = new byte[]{(byte)i};
            CharBuffer cb = cp.decode(ByteBuffer.wrap(x));
            char c = cb.array()[0];
            if (isPrintableChar(c)) {
                System.out.println(String.format("'%c': 0x%02X,", c, x[0]));
            } else {
                System.out.println(String.format("'\\u%04X': 0x%02X,", (int)c, x[0]));
            }
        }

        System.out.println(String.format("EBCDIC to ASCII"));
        for (int i = 0; i <= 255; i++) {
            byte[] x = new byte[]{(byte)i};
            CharBuffer cb = cp.decode(ByteBuffer.wrap(x));
            char c = cb.array()[0];
            if (isPrintableChar(c)) {
                System.out.println(String.format("0x%02X: '%c',", i, c));
            } else {
                System.out.println(String.format("0x%02X: '\\u%04X',", i, (int)c));
            }

        }
    }

    public static boolean isPrintableChar( char c ) {
        Character.UnicodeBlock block = Character.UnicodeBlock.of( c );
        return (!Character.isISOControl(c)) &&
                c != KeyEvent.CHAR_UNDEFINED &&
                block != null &&
                block != Character.UnicodeBlock.SPECIALS;
    }
}