这次忍心发了

package chen;import javax.swing.JOptionPane;public class Chen {/** * @param args */public static void main(String[] args) {// TODO Auto-generated method stubString temp[]={"张三","李四","王五","李一","李三"};String temp2[]={"1","2","3","4","5"};String idnameString=JOptionPane.showInputDialog(null,"请输入ID","用户登陆界面:",JOptionPane.QUESTION_MESSAGE); while(idnameString==null || "".equals(idnameString)){idnameString=JOptionPane.showInputDialog(null,"请重新输入用户名","警告",JOptionPane.WARNING_MESSAGE); } String passwordString=JOptionPane.showInputDialog(null,"请输入密码：","用户登录界面:",JOptionPane.QUESTION_MESSAGE); while(passwordString.length()==0){ passwordString=JOptionPane.showInputDialog(null,"请重新输入密码","警告",JOptionPane.WARNING_MESSAGE); } int i=0; for (; i<temp.length; i++){ if (temp[i].equals(idnameString)){ if(passwordString.equals(temp2[i])){JOptionPane.showMessageDialog(null,"您终于登录成功啦","系统信息",JOptionPane.INFORMATION_MESSAGE);break; }else{ JOptionPane.showMessageDialog(null,"密码错误","警告",JOptionPane.ERROR_MESSAGE); System.exit(0); } } } if(i>=temp.length){ JOptionPane.showMessageDialog(null,"用户名不存在","警告",JOptionPane.ERROR_MESSAGE); } }}