public class Homework01 {
public static void main(String[] args) {
String str="耿丹学院计算机Java20170320";
System.out.println(str.substring(11));
}
}
public class Homework02 {
public static void main(String[] args) {
String str="耿丹计算机Java20170320";
String newStr=str.replaceAll("Java","J2EE");
System.out.println("替换后的结果："+newStr);
}
}
public class Homework03 {
public static void main(String[] args) {
String str="耿丹 计算机 Java 20170320";
String newStr=str.replaceAll(" ","");
System.out.println("替换后的结果："+newStr);
}
}
public class Homework04 {
public static void main(String[] args) {
String str="11011119970921****";
System.out.println(str.substring(6,14));
}
}
