在JOptionPane中显示多行

Question

所以基本上我正在做的是从arraylist获取所有条目并在JOptionPane窗口中显示它们。但问题是每个条目每次都会打开一个新的JOPtionPane。有没有办法列出一个JOptionPane中的所有条目？谢谢。

for ( int i = 0; i < LoansList.size(); i++)
{
    Loans myLoans = (Loans) LoansList.get(i);                     

    JOptionPane.showMessageDialog(null, myLoans.showDetails() + "\n ",
    "", JOptionPane.INFORMATION_MESSAGE); 
}

Answer 1

这样做怎么样：

String acc = "";

for (int i = 0; i < LoansList.size(); i++)
{
    Loans myLoans = (Loans) LoansList.get(i); 

    acc += myLoans.showDetails () + "\n";
}

JOptionPane.showMessageDialog(null, acc, "", JOptionPane.INFORMATION_MESSAGE);