public class homework1 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str1="耿丹计算机Java20170320";
System.out.println(str1.substring(9,17));
}
}
package classwork;
public class Demo02{
public static void main(String[] args) {
// TODO Auto-generated method stub
String str="耿丹计算机Java20170320";
String newStr=str.replaceAll("ava","2EE");
System .out.println("替换后的结果："+newStr);
}
}
public class Demo01 {
public static void main(String[] args) {
// TODO Auto-generated method stub
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 homework4 {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str="142202199607040111";
System.out.println("此人的生日为：："+str.substring(07,04));
}
}
