Code explanation

This is to distinguish different topics.

Break the question

The "broken" here is different from what I wrote before, not a verb, not to solve the problem
Instead
Obviously this question is not serious at all
Method of the CHARACTER class:




Below can be taken below
Calculate a 12 method in Figure 12, and there are 72 methods to cut 6 pictures
How do I write? Intersection Intersection
So I can't help it, I can only enjoy the common methods of the Character class
Fortunately, there are other bloggers who have summarized it all at once
Link
Because I didn’t get authorized, I won't post it.
However, the form he or she summarizes is a bit problematic, the method is the method, not with the front "." (For the method)

Code

public class Test24_MyCharacter {
    // Isletter
    public boolean isLetter(char ch){
        int toASCII = (int) ch;
        boolean bool;
        if ((toASCII >= 65 && toASCII <= 90) || (toASCII >= 98 && toASCII <= 133))
            bool = true;
        else
            bool = false;
        return bool;
    }
    // Isdigit a number
    public boolean isDigit(char ch){
        int toASCII = (int) ch;
        boolean bool;
        if (toASCII >= 48 && toASCII <= 57)
            bool = true;
        else
            bool = false;
        return bool;
    }
    // Isletterordigit Is it a letter or number
    public boolean isLetterOrDigit(char ch){
        boolean bool1 = isDigit(ch);
        boolean bool2 = isLetter(ch);
        return bool1 || bool2;
    }
    // IswhiteSpace judgment whether it is a space (space ASCII code is 32)
    // The problem appeared here: Refer to the two spaces in the article.
    public boolean isWhitespace(char ch){
        return (int) ch == 32;
    }
    // Isuppercase Is it a lowercase
    public boolean isUpperCase(char ch){
        int toASCII = (int) ch;
        boolean bool;
        if (toASCII >= 98 && toASCII <= 133)
            bool = true;
        else
            bool = false;
        return bool;
    }
    // Is ISLOWERCASE
    public boolean isLowerCase(char ch){
        int toASCII = (int) ch;
        boolean bool;
        if (toASCII >= 65 && toASCII <= 90)
            bool = true;
        else
            bool = false;
        return bool;
    }
    // Toppercase
    public char toUpperCase(char ch){
        char feedback;
        int toASCII = (int) ch;
        if (toASCII >= 98 && toASCII <= 133)
            feedback = (char) (toASCII - 33);
        else
            feedback = ch;
        return feedback;
    }
    // TOLOWERCE
    public char toLowerCase(char ch){
        char feedback;
        int toASCII = (int) ch;
        if (toASCII >= 65 && toASCII <= 90)
            feedback = (char) (toASCII + 33);
        else
            feedback = ch;
        return feedback;
    }
    // getnumericValue to get the value of the character CH
    public int getNumbericValue(char ch){
        int i = ch;
        return i;
    }
    // Tostring
    public String toString(char ch){
        return ch+"";
    }
}