What does the Java compiler error message “ expected” mean?

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眼角桃花
眼角桃花 2021-01-19 02:26
class if{
    public static void main (String args[]){
        int x = 9;
        if (x <= 9){
            System.out.println(\"Yay\");
        }else{
                    


        
5条回答
  •  慢半拍i
    慢半拍i (楼主)
    2021-01-19 03:01

    if is a reserved keyword in Java (as seen in your if statement), and is thus not an eligible class name. Choose another name for your class, like IfTesting.

    By convention, all class names start with an upper-case letter. The full details for what is and isn't a valid Java identifier are found in the Java Language Specification. In short, it can't be a keyword, true, false, or null.

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