java.lang.Error

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  • Compilation error.
    via by Tonks Gabriel,
  • Compilation error.
    via by Winston Gutkowski,
    • java.lang.Error: Unresolved compilation problems: The constructor ExpressionTree(String) is undefined Syntax error on token "Calc", delete this token The method evaluate() is undefined for the type String at ExpressionTree$PrefixCalc.main(ExpressionTree.java:110)
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