Java 带有 ImageIcon 的构造函数

Question

I created a small program that inserts an ImageIcon (resized in another class) into a JLabel through a constructor I am struggling to return the icon in the JLabel

Here's my code:

Main Class :

        traforma imageObj = new traforma("image1.png"); //traforma is another class

        ImageIcon Icon11 = new ImageIcon(imageObj.Icon11);

         imageLabel.setIcon(Icon11);  //Here he gives me error, he can't find my ' Icon11 '

traforma Class :

public class traforma {


    public  traforma(String image) {
        ImageIcon Icon1 = new ImageIcon(getClass().getClassLoader().getResource(image));
        Image image = Icon1.getImage(); 
        Image newimg = image.getScaledInstance(470, 360,  java.awt.Image.SCALE_SMOOTH);
        ImageIcon Icon11 = new ImageIcon(newimg);

    }
    Object Icon11 = this.Icon11; // i guess the problem is here


}

I am new to Java, Hope I have been clear

Answer 1

This code makes no sense:

Object Icon11 = this.Icon11;

The problem is, that the variable "Icon11" that you initialized within the method is not used anywhere. After method completed, it will be thrown away. What you can do, is to assign the created icon object to the member variable, not to the local variable.

Thy style of your code is not perfect: the usage of lower and upper case, the usage of ImageIcon instead of directly loading image, etc. But if we keep it as close to your code as possible and try to do minimal changes, the working code may look as follows:

public class traforma {

    public  traforma(String image) {
        ImageIcon Icon1 = new ImageIcon(getClass().getClassLoader().getResource(image));
        Image image = Icon1.getImage(); 
        Image newimg = image.getScaledInstance(470, 360,  java.awt.Image.SCALE_SMOOTH);
        this.Icon11 = new ImageIcon(newimg);
    }

    public ImageIcon Icon11;

}