Java Proficiency: string program

Showing posts with label string program. Show all posts

Tuesday, 31 March 2015

Convert StringBuilder To String

In this example firstly create a string builder and then convert it to string using toString() method.

package com.javapro.string;

public class StringBuilderDemo {

public static void main(String[] args) {
      StringBuilder data=new StringBuilder("Hi");
      data.append(" How Are");
      data.append(" You");
      System.out.println("data="+data);

      String str=data.toString();

      System.out.println("str="+str);
}

}

Thursday, 19 March 2015

Expand String

Write A Function

String expnadString(String x);

string x="1,2,3,6";

output : 1,2,3,4,5,6

x=1,....,4....,10

output:

1,2,3,4,5,6,7,8,9,10

public class ExpandMyString {

    public static void main(String[] args) {
        TestData obj = new TestData();
        String x = "1,2,3,15,......,20,....,30";
        System.out.println("out put=" + obj.expnadString(x));
    }

    public String expnadString(String x) {
        String[] namesOfArray = x.split(",");
        char[] arr = namesOfArray[namesOfArray.length - 1].toCharArray();
        int i = 0;
        int num = 0;
        int zeroAscii = (int) '0';
        while (i < arr.length) {
            int charAscii = (int) arr[i];
            num = num * 10 + (charAscii - zeroAscii);
            i++;
        }

        String y = "";
        for (int j = 1; j < num; j++) {
            y += j + ",";
        }
        y += num;

        return y;
    }

}

Check a string value is Integer or not in java. (Solution).

Check ia string is hexadecimal number or not (Solution).

Generate Combination in java (Solution).

Generate permutation of string(Solution).

Reverse string in java (Solution).

Find duplicate characters with occurrences in a string(Solution).

Permutation of a number(Soluion).

Split the String in java(Solution).

Convert string into number in java(Solution).

Swap two strings without using any variable(Solution).

Get a number from a string in java(Solution).

Add Two Big Number In Java(Solution).

Expand String(Solution).

Reverse String (Solution).

Friday, 13 March 2015

Reverse a string

public class reverse_string {

    public static void main(String[] args) {
        String str="nit is a good college in india";
        char arr[]=str.toCharArray();
        int j=arr.length-1;
        int i=0;
        while(i<j){
            char ch=arr[i];
            arr[i]=arr[j];
            arr[j]=ch;
        i++;
        j--;
        }
     for (int k = 0; k < arr.length; k++) {
        System.out.print(arr[k]);
    }

    }

}

Output:

aidni ni egelloc doog a si tin

Java Proficiency