Question

In Java: Design a class that checks if a String is made of tokens of the same data type (for this, you may only consider four data types: boolean, int, double, or char). This class has two instance variables: the String of data and its delimiter. Other than the constructor, you should include a method, checkTokens, that takes one parameter, representing the data type expected (for example, 0 could represent boolean, 1 could represent int, 2 could represent double, and 3 could represent char). The method returns true if all the tokens in the String are of the specified data type; otherwise, it returns false.

Provide a sample output.

Answer 1

here is your class : ----------->>>>>>>>>

class CheckString{

private String data;

private String delimeter;

public CheckString(){

data = "";

delimeter = "";

}

public CheckString(String data,String delimeter){

this.data = data;

this.delimeter = delimeter;

}

public boolean checkTokens(int type){

if(type == 0){

String[] check = data.split(delimeter);

for(String s : check){

if(s.equals("true") || s.equals("false")){

}else{

return false;

}

}

return true;

}else if(type == 1){

String[] check = data.split(delimeter);

for(String s : check){

try{

Integer.parseInt(s);

}catch(Exception e){

return false;

}

}

return true;

}else if(type == 2){

String[] check = data.split(delimeter);

for(String s : check){

try{

Double.parseDouble(s);

}catch(Exception e){

return false;

}

}

return true;

}else if(type == 3){

String[] check = data.split(delimeter);

for(String s : check){

if(s.length() > 1){

return false;

}

}

return true;

}

return false;

}

}