>
[填空题] 请完善程序(程序文件名:Java_1.java)并进行调试。请在下画线处填入正确内容,然后删除下画线。请勿删除注释行和其他已有的语句内容。 题目要求: 请完善程序,程使序运行后输出窗口如下图所示。 源程序: import javax.swing.*; import java.text.DecimalFormat; public class Java_1 public static (1) main(String args[]) SimpleTime t=new SimpleTime(12, 30, 19); (2) . showMessageDialog(null, t.buildString(), "" this”引用示范", JOptionPane. INFORMATION_MESSAGE); System.exit(0); class SimpleTime private int hour, minute, second; public SimpleTime(int hour, int minute, int second) this. hour=hour; this. minute=minute; this. second=second; public String buildString() return "this. toString(): "+ (3)