Unsure how to proceed with checking whether a String only contains letters and the $ symbol.

Question

Hi I am unsure of how to check whether or not a String only contains letters and the $ symbol. In the video we had only gone for the class it had only gone over checking whether a char is a letter with Character.isLetter method however i am not sure Strings have the same method or what to do for this challenge task 2.
Any help is appreciated.

Richard Lambert · Accepted Answer

Hello mate,
The String class has the toCharArray() (https://docs.oracle.com/javase/7/docs/api/java/lang/String.html#toCharArray()) method which converts a string to an array of characters. From there, you can use an enhanced for loop (https://docs.oracle.com/javase/tutorial/displayCode.html?code=https://docs.oracle.com/javase/tutorial/java/nutsandbolts/examples/EnhancedForDemo.java) to iterate over each character element within the array for validation.
java
String name = "Christopher";
char[] lettersInName = name.toCharArray(); 
for (char eachLetter : lettersInName) { 
    //validation goes here
}

Hope this helps

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Christopher Manolis

Christopher Manolis

Unsure how to proceed with checking whether a String only contains letters and the $ symbol.

1 Answer

Richard Lambert

Richard Lambert

Fahad Mutair

Fahad Mutair