Task - String Programs - Trim a String

[akash-coded]

Slim-Trim

WAP that accepts a String as input from the user and trims it. Write myTrim(str) function which does the same.

Trimming eliminates leading and trailing spaces.

Hint - The Unicode value of space character is '\u0020'

[RohitNaikade1]

package Strings;

public class RemoveSpaces {
    public static void main(String[] args) {
        String str="     Rohit Naikade     ";
        int fcnt=0,lcnt=0;
        for(int i=0;i<str.length();i++) {
            if(str.charAt(i)!=' '){
                break;
            }
            fcnt++;
        }
        for(int i=str.length()-1;i>=0;i--) {
            if(str.charAt(i)!=' '){
                break;
            }
            lcnt++;
        }

        System.out.println(fcnt+" "+lcnt);
        String answer ="*"+str.substring(fcnt, str.length()-lcnt)+"*";
        String answer2="";
        for(int i=fcnt;i<str.length()-lcnt;i++) {
            answer2+=str.charAt(i);
        }
        System.out.println("Answer: "+answer);
        System.out.println("Answer2: "+answer2);
    }
}

[rakeshGit419]

public class Trim {
    static String trim(String s){
        int n = s.length();
        int i = 0;
        while (i < n && Character.isWhitespace(s.charAt(i))){i++;}
 
        int j = n - 1;
        while (j >= 0 && Character.isWhitespace(s.charAt(j))){j--;}
        return s.substring(i, j + 1);
    }
    public static void main(String[] args) {
        String str = "    ShowBot Rakesh   ";
        System.out.println("before trim - "+str);

        // String res = "";
        // for(int i=0;i<str.length();i++){
        //     char ch = str.charAt(i);
        //     if(ch != ' ') res += ch;
        // }
        // System.out.println(res);
        
        System.out.println("After trim - "+trim(str));

    }
}

[KaminiJha]

public class Trim {
    public static void main(String[] args) {
        String str="   kamini jha  ";
        String ans="";
        int i=0;
        while(str.charAt(i)==' ')
        {
            i++;
        }
        int j=str.length()-1;
        while(str.charAt(j)==' ')
        {
            j--;
        }
        for(int k=i;k<=j;k++)
        {
            ans+=str.charAt(k);
        }
        System.out.println(ans);
        
    }
}

[shreiyarandive]

public class RemovingTrialingSpaces {

    public static String myTrim(String s) {
        return s.replaceAll("^\\s+", "").replaceAll("\\s+$", "");
    }
    public static void main(String[] args) {
        String inp = "       Hello World    ";
        System.out.println("output: " + myTrim(inp));
    }
}

[lalit-ky]

public class StringTrim {
    static String trim(String s) {
        int i, j;
        int len = s.length();
        for (i = 0; s.charAt(i) == ' '; i++)
            ;
        for (j = len - 1; s.charAt(j) == ' '; j--)
            ;
        return s.substring(i, j + 1);
    }

    public static void main(String[] args) {
        String str = "Hello World     ";
        System.out.println(str + " length = " + str.length());
        str = trim(str);
        System.out.println(str + " length = " + str.length());
    }
}

[preeti-max]

`package StringOperations;
import java.util.Scanner;

public class Trim {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String s=" item ";

    int n=s.length();
    int i=0,j=n-1;
    while(i<n && s.charAt(i)==' '){
        
        i++;


    }
    while(j>=0 && s.charAt(j)==' '){
        j--;

    
}
System.out.println(s.substring(i,j+1));
System.out.println(n);
System.out.println(s.substring(i,j+1).length());

}
}`

[ratnadeepikavuddagiri]

`import java.util.Scanner;

public class StringTrim {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String str = scanner.nextLine();
String res="";
int n = str.length();
int i=0;
while(str.codePointAt(i)==32){
i++;
}
int j = str.length()-1;
while(str.codePointAt(j)==32){
j--;
}
for(int k=i;k<=j;k++){
res +=str.charAt(k);
}
System.out.println(res);
}
}
`

[BollapalliAkhila]

public class MyClass {
public static void main(String args[]) {
String str=" Hi this is Akhila ";
System.out.println("Before the method trim is used");
System.out.println(str.length());
str=str.trim();
System.out.println(str);
System.out.println(str.length());

}

}

[ShraddhaPenshanwar]

`package all_strings;

import java.util.*;

public class TrimImplementation {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    String input = sc.nextLine();

    int i = 0;
    while (input.charAt(i) == ' ' && i < input.length()) {
        input = input.substring(i);
        i++;
    }
    i = input.length() - 1;
    while (i >= 0) {
        if (input.charAt(i) != ' ') {
            break;
        }

        i--;

    }

    input = input.substring(0, ++i);
    System.out.println(input);

}

}`

[Gaurav-Joshi-31]

public class Testing {
    static String trailingSpaces(String s) {
        int i = 0;
        int j = s.length() - 1;
        char ch = s.charAt(i);
        char ch2 = s.charAt(j);
        while (ch == ' ') {
            i++;
            ch = s.charAt(i);

        }
        while (ch2 == ' ') {
            j--;
            ch2 = s.charAt(j);
        }
        return s.substring(i, j + 1);
    }

    public static void main(String[] args) {
        String s = "     Gaurav     ";
        System.out.println("-" + s + "-");
        System.out.println("-" + trailingSpaces(s) + "-");
    }
}

[ujjwal18bit1167]

package strings;

public class trim {
    public static void main(String[] args) {
      

        String mystr = "   My name is Ujjwal    ";

        int n = mystr.length();
        int i = 0;
        while (i< n && mystr.charAt(i) == ' ') {
            i++;
        }
        int j = n - 1;
        while (j >=0 && mystr.charAt(j) == ' ') {
            j--;
        }

        System.out.println(mystr.substring(i, j + 1));
    }
}

[Shubhi27]

package session14;

public class RemoveSpaces {
    public static void myTrim(String str) {
        int s = 0;
        int e = 0;
        for (int i = 0; i < str.length(); i++) {
            char c = str.charAt(i);
            if ((int) c != 32) {
                s = i;
                break;
            }
        }
        for (int i = str.length() - 1; i >= 0; i--) {
            char c = str.charAt(i);
            if ((int) c != 32) {
                e = i;
                break;
            }
        }
        System.out.println(str.substring(s, e + 1));
    }

    public static void main(String[] args) {
        myTrim(" Shubhi ");
        // String str1 = " Hello World ";
        // // System.out.println(str1);
        // // System.out.println(str1.trim());
    }

}

[Snehil6197]

public class MyClass {
public static void main(String args[]) {
String s=" john snow ";
int end = s.length()-1;
int start=0;
while(s.charAt(start)==' '){
start+=1;
}
while(s.charAt(end)==' '){
end-=1;
}
s=s.substring(start,end+1);
System.out.print(s);
}
}

[Sarfinaa]

public class TrimString {
    public static void main(String[] args) {
        String str = " hello world ";
        String result = "";
        int i = 0;
        while (str.charAt(i) == ' ') {
            i++;
        }
        int j = str.length() - 1;
        while (str.charAt(j) == ' ') {
            j--;
        }
        for (int k = i; k <= j; k++) {
            result += str.charAt(k);
        }
        System.out.println("Originial String:" + str + "\nOriginal String Length:" + str.length());
        System.out.println("Trimmed String:" + result + "\nTrimmed String Length:" + result.length());

    }
}

[sruthi-15-sketch]

import java.util.*;
public class Main
{
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String s=sc.nextLine();
System.out.println("Length of the string before trimming "+s.length());
int i=0;
while(s.charAt(i)==' '){
i++;
}
int j=s.length()-1;
while(s.charAt(j)==' '){
j--;
}
String res="";
for(int k=i;k<=j;k++){
res+=s.charAt(k);
//System.out.print(s.charAt(k)+"");
}
System.out.println();
System.out.println("Length of the string after trimming "+res.length());
}
}

[amruth2211]

`public class TrailSpace {
public static void main(String[] args) {
String s = " Hi Hello World ";
int n = s.length();
int i = 0, j = n - 1;
while (i < n && s.charAt(i) == ' ') {
i++;
}
while (j >= 0 && s.charAt(j) == ' ') {
j--;
}
System.out.println(s.substring(i, j + 1));

}

}`

[vysh675]

import java.util.*;

public class possstring {
public static void main(String args[]) {
String str1 = " impossible ";
int f = 0;
Scanner sc = new Scanner(System.in);
for (int i = 0; i < str1.length(); i++) {
if (str1.charAt(i) == ' ' && f == 0) {
str1.replace(' ', '');
} else if (str1.charAt(i) > 'a' && str1.charAt(i) < 'z') {
f = 1;
}
}
f = 0;
for (int i = str1.length()-1; i > 0; i--) {
if (str1.charAt(i) == ' ' && f == 0) {
str1.replace(' ', '');
} else if (str1.charAt(i) > 'a' && str1.charAt(i) < 'z') {
f = 1;
}
}
String str2="";
for(i=0;i<str1.length();i++)
{
if(str1.charAt(i)!='*')
str2+=str1.charAt(i);
}
System.out.print(str2);
}
}

[Amrit-Raj22]

package week3d4;

import java.util.Scanner;

public class trim {
    public static void main(String[] arg) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        System.out.println("current length:" + str.length() + "\t!!" + str + "!!");
        while (str.charAt(0) == ' ') {
            str = str.replaceFirst(" ", "");
            // System.out.println(str);
        }
        int j = 0;
        while (str.charAt(str.length() - j - 1) == ' ') {
            j++;
        }
        str = str.substring(0, str.length() - j);
        System.out.println("new length:" + str.length() + "\t !!" + str + "!!");

    }

}

[RohitN09]

public class TrimString {

    public static void myTrim(String s) {
        int lc = 0;
        int rc = s.length();

        for (int i = 0; i < s.length() - 1; i++) {
            if (s.charAt(i) != ' ') {
                break;
            } else
                lc++;
        }

        for (int j = s.length() - 1; j >= 0; j--) {
            if (s.charAt(j) != ' ') {
                break;
            } else
                rc--;
        }
        System.out.println(s.substring(lc, rc));
        System.out.println("Length after trimming: " + s.substring(lc, rc).length());
    }

    public static void main(String[] args) {
        String str = "   Hello World       ";
        System.out.println(str);
        System.out.println("Length before trimming: " + str.length());
        myTrim(str);
    }

}

[PavanArvapally]

`
import java.util.*;
public class StringTrim {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
trim(str);
}
private static void trim(String str) {
int fSpaceCount = 0, lSpaceCount = 0;
int length = str.length();
for(int i = 0; i<length; i++){
if(str.charAt(i) == ' '){
fSpaceCount++;
}
else
{
break;
}
}
for(int j = length-1; j>=0; j--){
if(str.charAt(j) == ' '){
lSpaceCount++;
}
else
{
break;
}
}
String afterTrim = str.substring(fSpaceCount, length-lSpaceCount);
System.out.println(afterTrim);
}
}

`

[abhiraj2k]

    package strings;

    public class CheckMutable {
        public static void main(String[] args) {
            String str = "  Hello world ";
            int i = 0;
            int j = str.length() - 1;
            while ((int) str.charAt(i) == 32 && (int) str.charAt(j) == 32) {
                str = str.substring(i + 1, j);
                j -= 2;
            }
            while ((int) str.charAt(i) == 32) {
                str = str.substring(i + 1);
                j--;
            }
            while ((int) str.charAt(j) == 32) {
                str = str.substring(0, j);
                j = str.length() - 1;
            }
            System.out.println(str);

        }
    }

[Ashwesh09]

package week4;

public class TrimingString {
    public static String trimString(String s) {
        char[] res = new char[s.length()];
        int startSpaces=0,endSpaces=0,k=0;
        for (int i = 0; i < s.length(); i++) {
            if (s.charAt(i) != ' ')
                break;
            startSpaces++;
        }
        System.out.println("Start spaces are:" + startSpaces);
        for (int i = s.length() - 1; i > startSpaces; i--) {
            if (s.charAt(i) != ' ')
                break;
            endSpaces++;
        }
        System.out.println("End spaces are:" + endSpaces);
        for (int i = startSpaces; i <= (s.length() - endSpaces -1); i++)
            res[k++] = s.charAt(i);
        return new String(res);
    }
    public static void main(String[] args) {
        String sample = "   Ash   wesh   ";
        System.out.println(trimString(sample));
    }
}

[Kavitha-Golamari]

import java.util.Scanner;
public class Trimming {
static void myTrim(String str){
String str1=" ";
int i=0;
while(str.charAt(i)==' ')
{
i++;
}
int j=str.length()-1;
while(str.charAt(j)==' ')
{
j--;
}
for(int k=i;k<=j;k++)
{
str1+=str.charAt(k);
}
System.out.println(str1);

}
public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    String str=sc.nextLine();
    myTrim(str);
}

}

[Ashritha-sd]

class RemoveSpaces {
public static void main(String args[])
{
String str=" hello world ";
int cnt1=0,cnt2=0;
for(int i=0;i<str.length();i++) {
if(str.charAt(i)!=' ')
{
break;
}
cnt1++;
}
for(int i=str.length()-1;i>=0;i--)
{
if(str.charAt(i)!=' ')
{
break;
}
cnt2++;
}
System.out.println(str.substring(cnt1-1,str.length()-cnt2));
}
}

[VigneshVishwa]

import java.util.Scanner;

public class TrimString {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine(); 
        int len = str.length();
        int i = 0;
        int j = len - 1;
        int countfront = 0;
        int countback = 0;
        while (str.charAt(i) == ' ') {
            countfront += 1;
            i++;
        }
        while (str.charAt(j) == ' ') {
            countback += 1;
            --j;
        }
        System.out.println(str.substring(countfront, len - countback));
    }
}

[GantaGreeshma]

public class NoTrim { public static void main(String[] args) { String str = " greeshma "; String res = ""; int i = 0; int j = str.length() - 1; while (str.charAt(i) == ' ') { i++; if (str.charAt(i) != ' ') { break; } } while (str.charAt(j) == ' ') { j--; if (str.charAt(j) != ' ') { break; } } for (int k = i; k <= j; k++) { res += str.charAt(k); } System.out.println(str); System.out.println(res); } }

[Prem-3]

`import java.lang.*;

public class Trim {
public static void main(String args[]) {
String s1 = " Prem Kumar ( Pk ) ";
System.out.println(s1.length());
System.out.println(s1); // Without trim()
String tr = s1.trim();
System.out.println(tr.length());
System.out.println(tr);
}
}

`

[Harshita-Joshi]

package Strings;

import java.util.Scanner;

public class trimAString {

    static String myTrim(String str){

        StringBuilder res = new StringBuilder();
        int leadingSpaces = 0;
        int leadingFlag = 0;
        int trailingSpaces = 0;
        int trailingFlag = 0;

        for(int i=0; i<str.length(); i++){
            if(leadingFlag==0){
                if(str.charAt(i)==' ')
                    leadingSpaces++;
                else
                    leadingFlag = 1;
            }
        }

        for(int i=str.length()-1; i>=0; i--){
            if(trailingFlag==0){
                if(str.charAt(i)==' ')
                    trailingSpaces++;
                else
                    trailingFlag = 1;
            }
        }

        res.append(str.substring(leadingSpaces, str.length()-trailingSpaces));
        return res.toString();

    }

    public static void main(String[] args) {
        
        Scanner scn = new Scanner(System.in);
        String str = scn.nextLine();

        str = myTrim(str);
        System.out.println("Trimmed string: "+ str);

    }
}

[charani712]

public class Trim {
public static void main(String[] args) {
String str=" Charani B ";
String ans="";
int i=0;
while(str.charAt(i)==' ')
{
i++;
}
int j=str.length()-1;
while(str.charAt(j)==' ')
{
j--;
}
for(int k=i;k<=j;k++)
{
ans+=str.charAt(k);
}
System.out.println(ans);

}
}

[mkaifahmed]

public class Trim {
    public static void main(String[] args) {
        String str="   kaif ahmed  ";
        String ans="";
        int i=0;
        while(str.charAt(i)==' ')
        {
            i++;
        }
        int j=str.length()-1;
        while(str.charAt(j)==' ')
        {
            j--;
        }
        for(int k=i;k<=j;k++)
        {
            ans+=str.charAt(k);
        }
        System.out.println(ans);
        
    }
}