如果文本不适合JLabel,我想减小字体大小

Question

String text = lnum.getText();        
System.out.println("String Text = "+text);//DEBUG
Font originalFont = (Font)lnum.getClientProperty("originalfont"); // Get the original Font from client properties            
 if (originalFont == null) { // First time we call it: add it
        originalFont = lnum.getFont();
        lnum.putClientProperty("originalfont", originalFont);
    }
 int stringWidth = lnum.getFontMetrics(originalFont).stringWidth(text);       

 int componentWidth = lnum.getWidth();
 stringWidth = stringWidth + 25; //DEBUG TRY
 if (stringWidth > componentWidth) { // Resize only if needed
        // Find out how much the font can shrink in width.
        double widthRatio = (double)componentWidth / (double)stringWidth;

        int newFontSize = (int)Math.floor(originalFont.getSize() * widthRatio); // Keep the minimum size

        // Set the label's font size to the newly determined size.
        lnum.setFont(new Font(originalFont.getName(), originalFont.getStyle(), newFontSize));
    }else{
        lnum.setFont(originalFont); // Text fits, do not change font size
        System.out.println("I didnt change it hahaha");//DEBUG 
 }
    lnum.setText(text);

线宽=线宽+25；//调试尝试

我不得不添加这段代码，这样它就增加了它得到的长度。这是我添加的代码，只是为了暂时解决问题。我想要一个永久的解决办法。

Answer 1

根据对你提到的问题的回答改编：

void setTextFit(JLabel label, String text) {
    Font originalFont = (Font)label.getClientProperty("originalfont"); // Get the original Font from client properties
    if (originalFont == null) { // First time we call it: add it
        originalFont = label.getFont();
        label.putClientProperty("originalfont", originalFont);
    }

    int stringWidth = label.getFontMetrics(originalFont).stringWidth(text);
    int componentWidth = label.getWidth();

    if (stringWidth > componentWidth) { // Resize only if needed
        // Find out how much the font can shrink in width.
        double widthRatio = (double)componentWidth / (double)stringWidth;

        int newFontSize = (int)Math.floor(originalFont.getSize() * widthRatio); // Keep the minimum size

        // Set the label's font size to the newly determined size.
        label.setFont(new Font(originalFont.getName(), originalFont.getStyle(), newFontSize));
    } else
        label.setFont(originalFont); // Text fits, do not change font size

    label.setText(text);
}

当您将显示一个合适的数字时，您应该将字体重置回原来的字体（请参见else部分）。

编辑：如果您不能/不想保留对原始字体的引用，可以将其保存为“客户端属性”（参见第一行）。