In this post, we will learn String – Find and replace the character (First occurrence) Program in java Programming language.
Question:
Write a Java program to find a character from a sentence and replace it with another character. If the character is not found in the string print “character not found”.
Note: Replace only the first occurrence.
Sample input 1:
Enter the string:
java programming
Enter the character to be searched:
a
Enter the character to replace:
o
Sample output 1:
jova programming
Sample input 2:
Enter the string:
java programming
Enter the character to be searched:
e
Enter the character to replace:
o
Sample output 2:
character not found
CODE:–
import java.util.*;
public class FirstOccurence
{
public static void main (String[] args) {
Scanner sc=new Scanner(System.in);
System.out.println("Enter the string:");
char[] str=sc.nextLine().toCharArray();
System.out.println("Enter the character to be searched:");
char srch=sc.next().charAt(0);
System.out.println("Enter the character to replace:");
char replace=sc.next().charAt(0);
int flag=0;
int len=str.length;
for(int i=0;i<len;i++)
{char r=str[i];
if(r==srch)
{
str[i]=replace;
flag++;
break;
}
}
if(flag==0)
{
System.out.println("character not found");
}
else
{
for(char i : str)
{
System.out.print(i);
}
}
}
}public class Student
{
private int id;
private String name;
private int[] marks;
private float average;
private char grade;
public void setId(int id)
{
this.id=id;
}
public int getId()
{
return this.id;
}
public void setName(String name)
{
this.name=name;
}
public String getName()
{
return this.name;
}
public void setMarks(int[] marks)
{
this.marks=marks;
}
public int[] getMarks()
{
return this.marks;
}
public void calculateAvg()
{ float sum=0;
for(int i=0;i<this.marks.length;i++)
{
sum+=this.marks[i];
}
average=(float)(sum/(this.marks.length));
setAverage(average);
}
public void findGrade()
{int flag=0;
for(int i=0;i<this.marks.length;i++)
{
if(this.marks[i]<50)
{
flag++;
}
}
if(flag>0)
{
grade='F';
}
else
{
if(this.average>=80 && this.average<=100)
{
grade='O';
}
else if(this.average>=50 && this.average<=79)
{
grade='A';
}
else
{
grade='F';
}
}
setGrade(grade);
}
public void setAverage(float average)
{
this.average=average;
}
public void setGrade(char grade)
{
this.grade=grade;
}
public float getAverage()
{
return this.average;
}
public char getGrade()
{
return this.grade;
}
}