Not a statement java ошибка что значит

I am new to java programming. I tried hello world program, but I got an error «not a statement«. Whereas when I copy, paste the hello world program from the internet, my program compiled. This is the program I used. What is meant by «not a statement«, please explain why I got this error and what is meant by it and what should I look for when I get this error in the future. Thanks!

public class hello
{
    public static void main(String args[]) {    
        System.out.println(“hello world”);
    }
}

My errors:-

hello.java:8: error: illegal character: 'u201c'
       System.out.println(“hello world”);
                          ^
hello.java:8: error: ';' expected
       System.out.println(“hello world”);
                           ^
hello.java:8: error: illegal character: 'u201d'
       System.out.println(“hello world”);
                                         ^
hello.java:8: error: not a statement
       System.out.println(“hello world”);
                                 ^
4 errors

You code cannot contain smart quotes like your used in your «Hello World». I replaced your smart/fancy quotes with the correct kind.

public class hello
{
    public static void main(String args[]) {    
        System.out.println("hello world");
    }
}

answered Jul 6, 2018 at 15:47

public class Hello
{
   public static void main(String args[])
   {
     int i = 1;
     for(i; ;i++ )
     {
        System.out.println(i);
     }      
}

}

I would like to understand why above code is giving error as:

not a statement for(i ; ; i++)

Because the raw i in the first position of your for is not a statement. You can declare and initialize variables in a for loop in Java. So, I think you wanted something like

// int i = 1;
for(int i = 1; ;i++ )
{
    System.out.println(i);
}      

If you need to access i after your loop you could also use

int i;
for(i = 1; ; i++)
{
    System.out.println(i);
}      

Or even

int i = 1;
for(; ; i++)
{
    System.out.println(i);
}      

This is covered by JLS-14.4. The for Statement which says (in part)

A for statement is executed by first executing the ForInit code:

If the ForInit code is a list of statement expressions (§14.8), the expressions are evaluated in sequence from left to right; their values, if any, are discarded.

The lone i at the start of the for statement doesn’t make any sense — it’s not a statement. Typically the variable of the for loop is initialized in the for statement as such:

for(int i = 1;; i++) {
    System.out.println(i);
}

This will loop forever though, as there is no test to break out of the for loop.

answered Feb 18, 2015 at 15:42

Change your for loop to:

 for(; ;i++ )

It will loop infinitely printing i. Your i is not of boolean type which you could have place in condition of for loop and for loop has format like:

for (init statement; condition; post looping)

So in your init statement you just had i which is not a valid statement and hence you get error from compiler.

answered Feb 18, 2015 at 15:34