《Java实战开发经典》第五章5.6

package xiti5;

public class Sixth {
public static void main(String[] args) {
String str1="Java技术学习班20070326";
System.out.println(str1.substring(9));
String str2="MLDN JAVA";
System.out.println(str2.replaceAll("JAVA", "J2EE"));
String str3="Java技术学习班20070326";
System.out.println(str3.charAt(7));
System.out.println(str3.replaceAll("0", ""));
String str4="Java技术学习班20070326 MLDN 老师";
//  System.out.println(str4);
System.out.println(str4.replaceAll(" ",""));    //用空代替空格
String str5="200173199310010307";
System.out.println(str5.subSequence(6, 14));
}
}