java 图形界面交互(简单)

有困难，找猪八戒
例子1:
import javax.swing.*;
public class a
{
public static void main(String[] args){
JTextArea outputArea = new JTextArea();
outputArea.setText("这就是要输出显示的字符串内容!");
JOptionPane.showMessageDialog(null,outputArea,"标题栏信息显示在此",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
};

例子2:
import javax.swing.JOptionPane;

public class Average1
{
public static void main(String args[]){
int total;//总分数
int gradeCounter;//班级人数
int gradeValue,average;//分数，平均分数
String grade;//接收从图形界面返回的值
total = 0;
gradeCounter = 1;

while(gradeCounter <= 10){
grade = JOptionPane.showInputDialog("Enter integer grade:");
gradeValue = Integer.parseInt(grade);
total += gradeValue;
gradeCounter++;
}

average = total/10;//求平均数
JOptionPane.showMessageDialog(null,"Class average is: " + average,"Class Average",JOptionPane.INFORMATION_MESSAGE);
System.exit(0);
}
}
有困难，找猪八戒