在java中将变量从if传递给else

Question

Defined a variable in if loop and need to pass the value updated in else if loop. Example :

if(document.getVersionIdentifier().getValue().equals("00"))
{
    String a=attrs.put(CREATED_BY, shortenFullName(document
                            .getCreatorFullName()));
    // Value a = USer1
}
else if(document.getVersionIdentifier().getValue().equals("01"))
{
    String b = attrs.put(document,a);
    // Need value of b to be User1
}

Answer 1

First of all, your question makes no sense. If the if statement is executed, the else if will be ignored hence passing on any data from the if body to the else if body is irrelevant.

However, what you can do is changing the else if to a separate if statement and define a outside of the if bodies. In principle this could look like this - needs tweaking as per what you really want (unclear from your question).

String a = null;
if(document.getVersionIdentifier().getValue().equals("00"))
{
    a = attrs.put(CREATED_BY, shortenFullName(document.getCreatorFullName()));
    // Value a = User1
}

// The value of a can be either null or set during the if statement above.
// If a has a value the next if statement will always be false so the value of a
// will be always null if the next if statement is true.
if(document.getVersionIdentifier().getValue().equals("01"))
{
    String b = attrs.put(document,a);
    // Need value of b to be User1
}