Intermediate Java(2) - Some More String Methods

public class apples{

public static void main(String[] args){

String s = "iamsohappytoday";

String a = "I am ";

String b = "happy";

String c = " HaHA ";

System.out.println(s.indexOf('a')); → string s哪個位置有a

System.out.println(s.indexOf('t',6)); → 由第6個位置開始,string s哪個位置有t,

System.out.println(s.indexOf("tod",6));→ 由第6個位置開始,string s哪個位置有tod,

System.out.println(a.concat(b)); → 等於 string a + string b

System.out.println(a.replace("I am","you are")); → you are取代I am

System.out.println(b.toUpperCase()); → 全部大寫

System.out.println(c.trim()); → 忽略所有的space

}

}

這是運行時的結果:

1

10

10

I am happy

you are

HAPPY

HaHA