java string is integer check code example

Example 1: java test if a string is a int

public static boolean isInt(String str) {
	
  	try {
      	@SuppressWarnings("unused")
    	int x = Integer.parseInt(str);
      	return true; //String is an Integer
	} catch (NumberFormatException e) {
    	return false; //String is not an Integer
	}
  	
}

Example 2: test if string is float java

public static void main(String[] args) {
    String str = "5588";
    //check if int
    try{
        Integer.parseInt(str);
    }catch(NumberFormatException e){
        //not int
    }
    //check if float
    try{
        Float.parseFloat(str);
    }catch(NumberFormatException e){
        //not float
    }
}