CODEWITHSUNDEEP
javaclasscompilationjava-7program-entry-point
Akhil Srivastava
Akhil Srivastava

Reputation: 11

Java main class instance access

I am not able to compile the following code. Not able to understand the compilation process here. why the main class instances are not been visible to other classes(test1). why it failing at compilation. Please help.

public class test {
    public int i = 10;
    public static void main(String[] args) {
           System.out.println("test main");
    }
}
class test1 {
     test t = new test();
     System.out.println(t.i);
 }

Upvotes: 1

Views: 213

Answers (2)

Konstantin Yovkov
Konstantin Yovkov

Reputation: 62864

The System.out.println(t.i); statement should be within a block or method.

For example, you can either place it within a block (static or non-static, nevermind).

public class test1 {
    test t = new test();

    static { //static can be omitted
        System.out.println(t.i);
    }
}

Or place is within a method

public class test1 {
    test t = new test();

    public static void printSomething() { //static can be omitted
        System.out.println(t.i);
    }
}

More info (thanks to @vidudaya):

Upvotes: 7

Aniket Thakur
Aniket Thakur

Reputation: 68915

System.out.println(t.i);

must be inside some method.

public class Test {
    public int i = 10;
    public static void main(String[] args) {
        System.out.println("test main");
    }
}


class Test1 {

    Test t = new Test();

    public void printI(){
        System.out.println(t.i);
    }

}

Also stick to java naming conventions. Class names must start with capital letters. variables and methods must be in camel case.

Upvotes: 2

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