JAvaにおけるsubString()とindexOf()の使い方
1447 ワード
【JavaSe】javaにおけるsubString()とindexOf()の使い方
package demo;
/**
* @ subString() indexOf() ,
* @author
*
*/
public class Test {
public static void main(String[] args) {
String str = "my name is xiaoye's chuanshou";
str = str.substring(6);// str=str.substring(int beginIndex); str beginIndex , str;
System.out.println(str);
str = str.substring(2, 10);// str beginIndex endIndex , str;( beginIndex , endIndex )
System.out.println(str);
String sr = "my name is xiaoye's chuanshou";
String sx = "is";
int index = sr.indexOf(sx);//
System.out.println(index+"<<<<");
int index2 = sr.indexOf(sx, 3);// 3 , sx=“is” , ,
System.out.println(index2+"<<<<<");
String str2="<12453>123";
System.out.println(str2.indexOf("wwww"));// wwww, , -1
System.out.println(str2.substring(str2.indexOf("123")+1,9)+"<<<<<<");
// , str2.index("123") 7, 7
// 1, 8
// 8 9 , subString , subString(8,9) 2
}
}