我学习Java没多久,刚运行了这个程序:
import javax.swing.JOptionPane;
public class Addition{
public static void main ( String args[] )
{
String firstNumber;
String secondNumber;
int number1, number2, sum;
firstNumber=JOptionPane.showInputDialog( "Entered first integer" );
secondNumber=JOptionPane.showInputDialog( "Entered second integer" );
number1=Integer.parseInt( firstNumber );
number2=Integer.parseInt( secondNumber );
sum=number1+number2;
JOptionPane.showMessgeDialog( null,"The sum = " + sum , " Results ", JOptionPane.PLAIN.MESSAGE );
System.exit(0);
} }总是出现这个错误:
符号: 方法 showMessgeDialog(<nulltype>,java.lang.String,java.lang.String,int)
位置: 类 javax.swing.JOptionPane
JOptionPane.showMessgeDialog( null,"The sum = " + sum , " Results ", JOptionPane.PLAIN_MESSAGE );
1 错误为什么?请高手指点!感激死了。
import javax.swing.JOptionPane;
public class Addition{
public static void main ( String args[] )
{
String firstNumber;
String secondNumber;
int number1, number2, sum;
firstNumber=JOptionPane.showInputDialog( "Entered first integer" );
secondNumber=JOptionPane.showInputDialog( "Entered second integer" );
number1=Integer.parseInt( firstNumber );
number2=Integer.parseInt( secondNumber );
sum=number1+number2;
JOptionPane.showMessgeDialog( null,"The sum = " + sum , " Results ", JOptionPane.PLAIN.MESSAGE );
System.exit(0);
} }总是出现这个错误:
符号: 方法 showMessgeDialog(<nulltype>,java.lang.String,java.lang.String,int)
位置: 类 javax.swing.JOptionPane
JOptionPane.showMessgeDialog( null,"The sum = " + sum , " Results ", JOptionPane.PLAIN_MESSAGE );
1 错误为什么?请高手指点!感激死了。
改成: JOptionPane.showMessageDialog(null, "The sum = " + sum, " Results ",
JOptionPane.PLAIN_MESSAGE);showMessageDialog 写成了 showMessgeDialog
JOptionPane.PLAIN_MESSAGE 写成了 JOptionPane.PLAIN.MESSAGE );