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Steven Parker228,026 Points
The error message "Example.java:6: error: unclosed string literal" tells you to look in the file "Example.java" on line 6 for a string that is missing a final quote mark.
Then, "Example.java:10: error: cannot find symbol" tells you that in "Example.java" on line 10 there's a reference to a symbol it doesn't know about. In this case its a spelling issue where the code has "swaphead" instead of "swapHead" (with a capital "H").