package cn.itcast_06;
/*code
替換功能:
String replace(char old,char new)
String replace(String old,String new)
去除字符串兩空格:
String trim()
按字典順序比較兩個字符串(大小)
int compareTo(String str)//區分大小寫
int compareToIgnoreCase(String str)//不區分大小寫
public class StringDemo {字符串
public static void main(String[] args) { // TODO Auto-generated method stub //替換功能 String s1 = "helloworld"; String s2 = s1.replace('l', 'k'); String s3 = s1.replace("ll", "kk"); String s4 = s1.replace("ll", "kkkkk"); System.out.println("s1:" + s1);//helloworld System.out.println("s2:" + s2);//hekkoworkd System.out.println("s3:" + s3);//hekkoworld System.out.println("s4:" + s4);//hekkkkkoworld //去除字符串兩端空格:String trim() String s5 = " hello world "; String s6 = s5.trim(); System.out.println("s5:" + s5 + "---"); System.out.println("s6:" + s6 + "---"); //按字典順序比較兩個字符串(大小) String s7 = "hello"; String s8 = "hfllo"; String s9 = "gbc"; String s10 = "xyz"; System.out.println(s7.compareTo(s7));//0 System.out.println(s7.compareTo(s8));//-1 System.out.println(s7.compareTo(s9));//1 System.out.println(s7.compareTo(s10));//-16 }
}it