《Java實戰開發經典》第五章5.6

package xiti5;

public class Sixth {
public static void main(String[] args) {
    String str1="Java技術學習班20070326";
    System.out.println(str1.substring(9));
    String str2="MLDN JAVA";
    System.out.println(str2.replaceAll("JAVA", "J2EE"));
    String str3="Java技術學習班20070326";
    System.out.println(str3.charAt(7));
    System.out.println(str3.replaceAll("0", ""));
    String str4="Java技術學習班20070326 MLDN 老師";
//  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));
}
}