public static void appendValue(final StringBuilder stringBuilder, final Object obj) {
        if (obj == null || obj instanceof String) {
            stringBuilder.append((String) obj);
        } else if (obj instanceof StringBuilderFormattable) {
            ((StringBuilderFormattable) obj).formatTo(stringBuilder);
        } else if (obj instanceof CharSequence) {
            stringBuilder.append((CharSequence) obj);
        } else if (obj instanceof Integer) { // LOG4J2-1437 unbox auto-boxed primitives to avoid calling toString()
            stringBuilder.append(((Integer) obj).intValue());
        } else if (obj instanceof Long) {
            stringBuilder.append(((Long) obj).longValue());
        } else if (obj instanceof Double) {
            stringBuilder.append(((Double) obj).doubleValue());
        } else if (obj instanceof Boolean) {
            stringBuilder.append(((Boolean) obj).booleanValue());
        } else if (obj instanceof Character) {
            stringBuilder.append(((Character) obj).charValue());
        } else if (obj instanceof Short) {
            stringBuilder.append(((Short) obj).shortValue());
        } else if (obj instanceof Float) {
            stringBuilder.append(((Float) obj).floatValue());
        } else {
            stringBuilder.append(obj);
        }
    }
public static void appendValue ( final StringBuilder stringBuilder , final Object obj ) { if ( obj == null || obj instanceof String ) { stringBuilder . append ( ( String ) obj ) ; } else if ( obj instanceof StringBuilderFormattable ) { ( ( StringBuilderFormattable ) obj ) . formatTo ( stringBuilder ) ; } else if ( obj instanceof CharSequence ) { stringBuilder . append ( ( CharSequence ) obj ) ; } else if ( obj instanceof Integer ) { stringBuilder . append ( ( ( Integer ) obj ) . intValue ( ) ) ; } else if ( obj instanceof Long ) { stringBuilder . append ( ( ( Long ) obj ) . longValue ( ) ) ; } else if ( obj instanceof Double ) { stringBuilder . append ( ( ( Double ) obj ) . doubleValue ( ) ) ; } else if ( obj instanceof Boolean ) { stringBuilder . append ( ( ( Boolean ) obj ) . booleanValue ( ) ) ; } else if ( obj instanceof Character ) { stringBuilder . append ( ( ( Character ) obj ) . charValue ( ) ) ; } else if ( obj instanceof Short ) { stringBuilder . append ( ( ( Short ) obj ) . shortValue ( ) ) ; } else if ( obj instanceof Float ) { stringBuilder . append ( ( ( Float ) obj ) . floatValue ( ) ) ; } else { stringBuilder . append ( obj ) ; } }
Appends a text representation of the specified object to the specified StringBuilder,
if possible without allocating temporary objects.

@param stringBuilder the StringBuilder to append the value to
@param obj the object whose text representation to append to the StringBuilder