Boolean parseBoolean 1 false

Question

sorry to be a pain    I have  HashMap lt String  String gt  o  o get  uses votes        1    Yet     Boolean parseBoolean o get  uses votes         false    I m guessing that     parseBoolean doesn t accept the standard 0   false 1   true   Am I doing something wrong or will I have to wrap my code in   boolean uses votes   false  if o get  uses votes   equals  1          uses votes   true      Thanks

User · Accepted Answer

It accepts only a string value of  true  to represent boolean true  Best what you can do is  boolean uses votes    1  equals o get  uses votes       Or if the Map actually represents an  entitiy   I think a Javabean is way much better  Or if it represents configuration settings  you may want to take a look into Apache Commons Configuration

User · Answer

Thomas   I think your wrapper code  or just the condition itself  is the cleanest way to do what you want to do in java  which is convert  1  to the Boolean True value   Actually  comparing to  0  and taking the inverse would match the C behavior of treating 0 as false and everything else as true     Boolean intStringToBoolean numericBooleanValueString      return   0  equals numericBooleanValueString

User · Answer

Java is strongly typed  0 and 1 are numbers  which is a different type than a boolean  A number will never be equal to a boolean

User · Answer

How about this   boolean uses votes         1 yes on true          indexOf     o get  uses votes   toLowerCase               gt  -1

User · Answer

As a note   for those who need to have null value for things other than  true  or  false  strings    you can use the function below  public Boolean tryParseBoolean String inputBoolean            if  inputBoolean equals  true   amp  amp  inputBoolean equals  false    return null      return Boolean valueOf inputBoolean

User · Answer

If you re trying to get C s behavior  0    false and everything else is true   you could do this   boolean uses votes   Integer parseInt o get  uses votes       0

User · Answer

I have a small utility function to convert all possible values into Boolean    private boolean convertToBoolean String value        boolean returnValue   false      if   1  equalsIgnoreCase value      yes  equalsIgnoreCase value               true  equalsIgnoreCase value      on  equalsIgnoreCase value           returnValue   true      return returnValue

User · Answer

According to the documentation  emphasis mine       Parses the string argument as a boolean  The boolean returned   represents the value true if the string argument is not null and is   equal  ignoring case  to the string  true

User · Answer

I know this is an old thread  but what about borrowing from C syntax    o get  uses votes    equals  1     true   false

User · Answer

Returns true if comes  y    1    true    on or whatever you add in similar way  boolean getValue String value      return   Y  equals value toUpperCase               1  equals value toUpperCase              TRUE  equals value toUpperCase              ON  equals value toUpperCase

User · Answer

I had the same question and i solved it with that   Boolean use vote   o get  uses votes   equals  1     true   false

[java] Boolean.parseBoolean("1") = false...?

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