java 数字格式转换异常（NumberFornatException）

public class Runtime_07 { private String name; private String password; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public static void main(String[] args) { Runtime_07 r7 = new Runtime_07(); String name = r7.getName(); int password = new Integer(r7.getPassword()).intValue(); System.out.println("用户名为" + name + ";密码为" + password); } }