Printing my toString method

Hi. I'm trying to get it so that I can print off my toString method. Or send the variable allStr from the toString method to the main method and print it there. I don't know enough about Java to figure it out myself, and I could really use some help.

Code:

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import javax.swing.JOptionPane;

public class Driver
{
        String license;
        String name;
        String street;
        String city;
        String province;
       
        public Driver()
        {
                license = "N/A";
                name = "N/A";
                street = "N/A";
                city = "N/A";
                province = "N/A";
        }
       
        public Driver( String lE, String nE, String sT, String cY, String pE )
        {
                license = lE;
                name = nE;
                street = sT;
                city = cY;
                province = pE;
        }
       
        public String toString( Driver drStr)
        {
                String licStr = license;
                String namStr = name;
                String strStr = street;
                String citStr = city;
                String proStr = province;
               
                String allStr = licStr + " belongs too " + namStr + " who lives at " + strStr + " in " + citStr + ", " + proStr;
                System.out.println( allStr );
                return allStr;
        }

        public static void main( String[] args )
        {
                Driver driver;
               
                System.out.println( "This is the main method" );
               
                String lE = (JOptionPane.showInputDialog( "License number:" ));
                String nE = (JOptionPane.showInputDialog( "Name:" ));
                String sT = (JOptionPane.showInputDialog( "Street:" ));
                String cY = (JOptionPane.showInputDialog( "City:" ));
                String pE = (JOptionPane.showInputDialog( "Province:" ));
               
                driver = new Driver( lE, nE, sT, cY, pE );
               
                System.out.println( toString );
        }
}

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The usual set up is for toString() to return a String that is descriptive of the Driver instance. This means (1) that it takes no arguments and (2) that it does not do System.out.println() stuff.

Code:

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public String toString() {
    return license + " belongs to " + name + etc
}

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Then when you want to use it you call the toString() of a particular instance of Driver.

Code:

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driver = new Driver( lE, nE, sT, cY, pE );
System.out.println( driver.toString() );

---

-----------------

Your variable names are a bit cyptic. Consider using license for the license string everywhere.

Code:

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public class Driver
{
    String license;
    // etc
       
    public Driver()
    {
        license = "N/A";
        // etc
    }

    public Driver( String license, etc )
    {
        this.license = license;
        // etc
    }

    public static void main( String[] args )
    {
        Driver driver;
               
        System.out.println( "This is the main method" );
               
        String license = (JOptionPane.showInputDialog( "License number:" ));
        // etc
               
        driver = new Driver( license, etc );
               
        System.out.println( driver.toString() );
    }
}

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to call method

Code:

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    int aInt = 25;
    String aString = aInt.toString()

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In your case your toString() method has a parameter so you have to pass that object on your method.

Good Luck.

Quote:

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Originally Posted by mine0926

to call method

Code:

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    int aInt = 25;
    String aString = aInt.toString()

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In your case your toString() method has a parameter so you have to pass that object on your method.

Good Luck.

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That code won't compile. aInt is primitive so you can't call methods on it.

The String argument in the OP's version of toString() is never used. The best thing is not to supply such an argument (what string would you supply?) but, rather, to remove it from the toString() definition.

did not test it, my fault. It should be

Code:

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Integer aInt = new Integer(25);

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