java - 从方法返回的StretchIcon类不起作用。导致错误

直接调用-new StretchIcon(imageStr);-有效。

但不是从方法返回时。导致错误。

public static ImageIcon getPhotoSI(String imageStr){
    return new StretchIcon(imageStr);
}

可能是什么问题呢？

StretchIcon Link

错误

Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException:
  Uncompilable source code - Erroneous ctor sym type: library.StretchIcon.<init>
    at library.IImage.getPhotoSI(IImage.java:36)
    at Users.populateTable(Users.java:448)
    at FrmUsers.btnSearch_ActionPerformed(FrmUsers.java:455)
    at FrmUsers.access$600(FrmUsers.java:18)

最佳答案

我是Java新手。似乎问题出在助手类(StretchIcon.java)中不包括其软件包名称。

喜欢

包库；

到StretchIcon.java。在不运行应用程序的情况下运行该应用程序将导致运行时错误，并且netbeans无法将某些相关元素包含到已编译的源代码中。

喜欢

   package library; // <- this one.

import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;
import java.awt.image.ImageObserver;
import java.net.URL;
import javax.swing.ImageIcon;

    public class StretchIcon extends ImageIcon {

      /**
       * Determines whether the aspect ratio of the image is maintained.
       * Set to <code>false</code> to allow th image to distort to fill the component.
       */
      protected boolean proportionate = true;

      /**
       * Creates a <CODE>StretchIcon</CODE> from an array of bytes.
       *
       * @param  imageData an array of pixels in an image format supported by
       *             the AWT Toolkit, such as GIF, JPEG, or (as of 1.3) PNG
       *
       * @see ImageIcon#ImageIcon(byte[])
       */
      public StretchIcon(byte[] imageData) {
        super(imageData);
      }

      /**
       * Creates a <CODE>StretchIcon</CODE> from an array of bytes with the specified behavior.
       *
       * @param  imageData an array of pixels in an image format supported by
       *             the AWT Toolkit, such as GIF, JPEG, or (as of 1.3) PNG
       * @param proportionate <code>true</code> to retain the image's aspect ratio,
       *        <code>false</code> to allow distortion of the image to fill the
       *        component.
       *
       * @see ImageIcon#ImageIcon(byte[])
       */
      public StretchIcon(byte[] imageData, boolean proportionate) {
        super(imageData);
        this.proportionate = proportionate;
      }

    }

关于java - 从方法返回的StretchIcon类不起作用。导致错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/48278718/