Question

JOptionPane.showMessageDialog("Employee Id Is  "+
 empid , "\nEmploye Name is  " + employeename ,
"\nFather Name is " + fathername ,
"\nJob Catagory is  " + jobcatagory,
"\nAge is  " + age,
"\nEducation is  " + education,
"\nPay Scale is   " + payscal,
"\nNIC is  " + NIC );

我收到此错误

no suitable method found for showMessageDialog(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String)
    method javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object,java.lang.String,int,javax.swing.Icon) is not applicable
      (actual and formal argument lists differ in length)
    method javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object,java.lang.String,int) is not applicable
      (actual and formal argument lists differ in length)
    method javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object) is not applicable
      (actual and formal argument lists differ in length)

Answer 1

您使用,代替+进行字符串连接

JOptionPane.showMessageDialog("Employee Id Is  "+
 empid , "\nEmploye Name is  " + employeename +
"\nFather Name is " + fathername +
"\nJob Catagory is  " + jobcatagory +
"\nAge is  " + age +
"\nEducation is  " + education +
"\nPay Scale is   " + payscal+
"\nNIC is  " + NIC );

您将错误的参数传递给showMessageDialog（）方法。

请参阅JOptionPane及其方法签名here

Answer 2

javax.swing.JOptionPane提供了三种重写方法：

javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object,java.lang.String,int,javax.swing.Icon) 
javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object,java.lang.String,int)
javax.swing.JOptionPane.showMessageDialog(java.awt.Component,java.lang.Object)

你正在调用一个未在该类中定义的方法：

showMessageDialog(java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String,java.lang.String)

我想“，”而不是“+”有问题。

Answer 3

你在输出语句之前忘记了null，如在JOptionPane.showMessageDialog中那样（null，＆＃34; ....＆＃34;）; 你不能使用＆＃34;，＆＃34;只有＆＃34; +＆＃34;

Answer 4

//C[E/F]

你必须先放JOptionPane.showMessageDialog(null,"Your text "+anyVariable+"any more text", "The BoxHeader title", JOptionPane.PLAIN_MESSAGE);，然后不要忘记＆＃34; Box标题＆＃34;后跟逗号（，）和null

找不到适合showMessageDialog的方法

4 个答案: