Java模拟 trim 方法,去除字符串两端空格
作者:互联网
public class StringDemo1 {
@Test
public void show() {
String s1 = " hello world sss ";
String s2 = myTrim(s1);
System.out.println(s2); //=> hello world sss
}
public String myTrim(String str) {
char[] chars = str.toCharArray();
int leftIndex = 0;
int rightIndex = 0;
// 先获取最左边不是空格的下标
for (int i = 0; i < chars.length; i++) {
if (chars[i] != ' ') {
leftIndex = i;
break;
}
}
// 在获取最右边不是空格的下标
for (int i = chars.length - 1; i >= 0; i--) {
if (chars[i] != ' ') {
rightIndex = i;
break;
}
}
return str.substring(leftIndex, rightIndex + 1);
}
}
标签:trim,Java,String,int,chars,空格,rightIndex,leftIndex,public 来源: https://www.cnblogs.com/songzxblog/p/15093920.html