Java 如何设置 JTextArea 大小？
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How to set JTextArea size?
提问by Borat Sagddiev
I want to set a fixed size for JtextAreawithin JOptionPane
我想设置为一个固定大小的JtextArea内JOptionPane
public static void main(String[] args) {
JTextArea headersTxt = new JTextArea();
for (int i = 0 ; i < 50 ; i ++ ) {
headersTxt.append("test \n") ;
}
JScrollPane scroll = new JScrollPane(headersTxt);
scroll.setSize (300,600) ; // this line silently ignored
int test = JOptionPane.showConfirmDialog(null, scroll,"test", JOptionPane.OK_CANCEL_OPTION) ;
}
However, the above code ignores scroll.setSize (300,600) ;
但是，上面的代码忽略了 scroll.setSize (300,600) ;
It works fine but the size is not fixed . What is the problem with scroll.setSize (300,600) ;?
它工作正常，但大小不固定。有什么问题scroll.setSize (300,600) ;？
采纳答案by MadProgrammer
Because each system can render fonts differently, you should avoid using pixel measurements where possible
因为每个系统可以以不同的方式呈现字体，所以您应该尽可能避免使用像素测量
Instead, provide the rows and columns you want to display
相反，提供要显示的行和列
JTextArea ta = new JTextArea(5, 20);
