validate if string is integer java code example

Example 1: 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
    }
}

Example 2: java check if string is number

try {
    int n = Integer.parseInt(str);
} catch (NumberFormatException e) {
    // str is not a number
}