Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static String toUpperString(String s) {
        int idx = 0;
        for (; idx < s.length(); idx++) {
            char c = s.charAt(idx);
            if (c >= 'a' && c <= 'z') {
                break;
            }
        }
        if (idx == s.length()) {
            return s;
        }
        StringBuilder buf = new StringBuilder(s.substring(0, idx));
        for (; idx < s.length(); idx++) {
            buf.append(toUpper(s.charAt(idx)));
        }
        return buf.toString();
    }

    public static char toUpper(char c) {
        if (c >= 'a' && c <= 'z') {
            c -= 0x20;
        }
        return c;
    }
}