removing the trailing space of a string only

[kay lin]

Hi:
the trim() removes both the trailing and leading space, however if i only want to remove the trailing space of a string, i guess i will have to write my own routine, correct?

here is the code that removes the trailing space only

String str = " abcdefg ";
   int i;
        for ( i=str.length()-1;i>0;i--){
            char c = str.charAt(i);
            if (c != '\u0020') {
                break;
            }
        }
        
String a = str.substring(0, i+1); 
 

bascially i took the string in reverse and exit the loop as soon as it sees the first non white space character. Is there any easier way to do this? i thought mine was still a bit complicated....

Many thanks

[Stan James]

I think that's about it. You might want a version that lets you pass in the character to remove so you could trim trailing zeros or asterisks or whatever. trim() removes all whitespace, not just blanks. Don't know if you want to do that or not.

[saurabh sablok]

i m using trim to remove space but i dont want to remove the trailing zero from string.
it is changing 10 to 1.what can i use instead of trim().

[Kowshik Nandagudi]

Regular expressions should do it for you

s = s.replaceAll("\\s+$", "");

[Campbell Ritchie]

Welcome to the Ranch

How on earth do you get trim() to remove a 0?

[saurabh sablok]

Connection con=null;
Statement st=null;
ResultSet rs=null;
String formno=null;
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:ss");
st=con.createStatement();
rs=st.executeQuery("select formno from purchaseform");

int a=0;
if(rs.next())
{
	formno=rs.getString(1);
	while(rs.next())
	{
		formno=rs.getString(1);
	}
	String b=(formno.substring(3,formno.length()));
	a=Integer.parseInt(b.trim());
	a=a+1;
}
else
{
	a=1;
}
formno="PF_"+a;
rs.close();
st.close;
con.close();
}

here is the code in which i m using trim() & its not working properly.

[Campbell Ritchie]

Why are you using the length as the second argument to String#substring()? Why don't you miss it out?

[saurabh sablok]

what should i use as end point in substring()?

[Darryl Burke]

http://download.oracle.com/javase/6/docs/api/java/lang/String.html#substring(int)

[Claudiu Chelemen]

Hello!

To remove only the trailing characters from the String, you could use stripEnd method from apache commons StringUtils.
Check the link for details.

http://commons.apache.org/lang/api-2.5/org/apache/commons/lang/StringUtils.html#stripEnd(java.lang.String, java.lang.String)

Cheers!

[Campbell Ritchie]

Welcome to the Ranch, Claudiu Chelemen Good idea, looking at Apache Commons; we tend to forget what useful stuff they have there.