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Thread: Incompatible types

  1. #1
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    Default Incompatible types

    In the method addNoDuplicateSources, the if statement has an error message - incompatible types.
    The input parameter to the method is a string and the return parameter from the getSource() method
    is a String. Why would the if statement give an incompatible types message.?

    import java.util.*;
    public class AnotherWord
        private String word;
        private Vector<String> sourceList;
        private int count;
        public AnotherWord( String word, String source )
            this.word = word.toLowerCase();
            count = 1;
            sourceList = new Vector<String> (3,2);
            sourceList.add( (String) source );
        public void addNoDuplicateSources( String sourceToAdd)
            boolean found = false;
            for (int i = 0; i <= sourceList.size(); i++)
                if ( getSource(i).compareToIgnoreCase(sourceToAdd) ) { found = true; }
            if (!found) { sourceList.add( sourceToAdd ); }
        public String getSource(int index) 
            String result = null;
            if (index >=0 && index < sourceList.size()) { result = sourceList.get(index); }
            return result;

    --- Update ---

    Ignore this post

  2. #2
    Think of me.... Mr.777's Avatar
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    Default Re: Incompatible types

    I would suggest you to read the syntax for if statement.

    Also, do you know, what this function String.compareToIgnoreCase(String) returns?
    Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young.

    - Henry Ford

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