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          2£©ÔÚij¸ö¹¹Ôì·½·¨ÖÐÒªÇóʹÓÃthis()µÄ·½Ê½µ÷ÓÃÆäËü¹¹Ôì·½·¨

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Java code:

public class Student {

private String name;

private int age;

public Student() {
this("xiaomin", 18);
}

public Student(String name, int age) {
this.name = name;
this.age = age;
}

public int getNameLength() {
if (this.name == null || "".equals(this.name)) {
return 0;
}
return this.name.length();
}

public int getAge() {
return age;
}

public String getFirstChar() {
try {
String firstChar = this.name.substring(0, 1);
return firstChar;
} catch (Exception e) {
return "";
}
}

public static void main(String[] args) {
Student s = new Student();
System.out.println(s.getAge());


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public class MailAction extends BaseAction {
    private String smtphost = Constants.MAIL_SERVER_IP; // ·¢ËÍÓʼþ·þÎñÆ÷IP
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