Java Utililty Methods Boolean Value From

return (b != null) ? b.booleanValue() : def;

if (value == null)
 return false;
else
 return value.booleanValue();

return booleanValue == null ? false : booleanValue.booleanValue();

if (arg instanceof Boolean)
 return ((Boolean) arg).booleanValue();
else
 return Boolean.parseBoolean(arg.toString());

boolean associationEvaluation = true;
if (associationValue != null) {
 if (associationValue instanceof Number) {
 if (((Number) associationValue).intValue() == 0) {
 associationEvaluation = false;
 } else if (associationValue instanceof String) {
 String associationValueString = (String) associationValue;
...

if (obj != null) {
 if (obj instanceof Boolean) {
 return ((Boolean) obj).booleanValue();
 String stringValue = obj.toString().toLowerCase();
 if (isTrueString(stringValue)) {
 return true;
 } else if (isFalseString(stringValue)) {
...

if (object instanceof Number) {
 double value = ((Number) object).doubleValue();
 final int negZero = -0;
 return value != 0 && value != negZero && !Double.isNaN(value);
if (object instanceof Boolean) {
 return ((Boolean) object).booleanValue();
if (object instanceof String) {
 return ((String) object).length() != 0;
return object != null;

if (value == null)
 return false;
if (value instanceof Boolean)
 return ((Boolean) value).booleanValue();
if (value instanceof Number)
 return ((Number) value).intValue() != 0;
return "TRUE".equalsIgnoreCase(value.toString());

boolean b = false;
if (s != null) {
 if (s.equalsIgnoreCase("yes")) {
 b = true;
 } else {
 b = Boolean.parseBoolean(s);
return b;

if (s.equals("true") || s.equals("1")) {
 return true;
} else if (s.equals("false") || s.equals("0")) {
 return false;
} else {
 throw new IllegalArgumentException("Not an XML boolean: " + s);