Product Version = NetBeans IDE 7.4 Beta (Build 201307092200)
Operating System = Windows 7 version 6.1 running on amd64
Java; VM; Vendor = 1.7.0_25
Runtime = Java HotSpot(TM) 64-Bit Server VM 23.25-b01

New Java Project; class as follows:
"
package test;

public class TestMethod
{
    public boolean getCondition1()
    {
        final String s = "s1";
        final boolean isS = Boolean.parseBoolean( s );
        return isS;
    }
    
    public boolean getCondition2()
    {
        final String s = "s2";
        final boolean isS = Boolean.parseBoolean( s );
        return isS;
    }
}
"
Marking Lines 8/9
"
        final boolean isS = Boolean.parseBoolean( s );
        return isS;
"
and executing "Introduce Method". New function name "getBoolean", accepting "alter semantics".
Result:
"
package test;

public class TestMethod
{
    public boolean getCondition1()
    {
        final String s = "s1";
        return getBoolean( s );
    }
    
    public boolean getCondition2()
    {
        final String s = "s2";
        getBoolean( s );
    }

    private boolean getBoolean( final String s )
    {
        final boolean isS = Boolean.parseBoolean( s );
        return isS;
    }
}
"
In getCondition2 the return statement is missing. 
In my opinion this should be handled in the same way as in getCondition1.