member variables

[Abiodun Adisa]

I have this program
package untitled7;

public class test {
int das;// this das
public test() {
}

public static void main(String[] args) {
test test1 = new test();
int das=7;
System.out.println(??);
}
}

i want to print the value of the first das in the println statement not the second das

[Barry Gaunt]

You have created one instance of the class test which is referenced by the variable test1. To access test1's variable das, you can use test1.das in your println statement.

[Abiodun Adisa]

thats one way there is another way to reference the member variable???/

[Ernest Friedman-Hill]

Well, no. Copies of "das" occur only inside instances of the class. Without creating an instance, you don't have any member variables.

[Mike Gershman]

There are some more advanced techniques using reflection, but they don't add any advantage.

A object-oriented purist would prefer code that centralizes all direct references to das to one accessor method and one mutator method. This allows edits to be added in one place and lets you change the real das to, say, different units of measure without looking at every bit of code that depends on das. It also works better with JavaBeans.

 
public class test {
 
    int das = 5;// this das
    
    public test() {
    }
 
    public static void main(String[] args) {
        test test1 = new test();
        int das=7;
        System.out.println( test1.getDas() );
    }
    
    public int getDas() {
        return das;
    }
    
    public void setDas( int das ) {
        this.das = das;
    }
}