Arduino入門：Stringクラス

//Arduino Sketch Example: Straing Class, Syntax of Constructor
//Date: 2015.1.12
//Auther: easy labo

//Syntax
String(value)
String(value, base) 
//value: character, integer, string, etc. 
//base: BIN, DEC, HEX

//Arduino Sketch Example: Straing Class, Object Constructors
//Date: 2015.1.12
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

String strBufA = "easy labo";   // (A)using a constant String
String strBufB =  String('A');  // (B)converting a constant char into a String
String strBufC =  String("StringC");  // (C)converting a constant string into a String object
String strBufD =  String( StringC + " with more");  // (D) concatenating two strings
String strBufE =  String(8);  // (E)using a constant integer
String strBufF =  String(analogRead(0), DEC); // (F)using an int and a base
String strBufG =  String(24, HEX);  // (G)using an int and a base (hexadecimal)
String strBufH =  String(128, BIN);  // (H)using an int and a base (binary)
String strBufI =  String(millis(), DEC); // (I)using a long and a base

//Arduino Sketch Example: Straing Class, String Character Functions
//Date: 2015.1.12
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

//char string.charAt(int n)
String strBuf = "ABCDEF";
Serial.println(strBuf.charAt(1)); // return 'B'

//int string1.compareTo(string string2)
String strBuf = "abc";
Serial.println(strBuf.compareTo("abb"));  // retrun 1
Serial.println(strBuf.compareTo("abc"));  // return 0
Serial.println(strBuf.compareTo("abd"));  // return -1

//string string1.concat(string string2)
String strBuf = "abc";
strBuf.concat("def");  //strBuf = strBuf + string2
Serial.println(strBuf);  //return "abcdef"

//int* string.c_str()
string strBuf = "Hello, world";
Serial.begin (115200);
Serial.println (strBuf.c_str ()); //c_str returns a pointer to the C-style version of the invoking string.

//boolean string1.endsWith(string string2)
boolean chkEnd;
String strBuf = "abcde";
chkEnd = strBuf.endsWith("de");  // return true
chkEnd = strBuf.endsWith("ef");  // return false

//boolean string1.equals(string string2)
boolean sameString;
String strBuf = "AbCdE";
sameString = strBuf.equals("AbCdE");  // return true
sameString = strBuf.equals("abcde");  // return false

//booelan string1.equalsIgnoreCase(string string2)
boolean sameString;
String strBuf = "AbCdE";
sameString = strBuf.equalsIgnoreCase("AbCdE");  // return true
sameString = strBuf.equalsIgnoreCase("abcde");  // return true
sameString = strBuf.equalsIgnoreCase("bcdef");  // return false

//byte string.getBytes(byte buffer, int length)
String strBuf = "ABCD";
byte byteBuf;
strBuf.getBytes(byteBuf,5);  // byteBuf is ABCD

//int string1.indexOf(string string2, int from)
String strBuf = "abcdefg";
Serial.println(strBuf.indexOf("ef"));  // return 4
Serial.println(strBuf.indexOf("jk"));  // return -1
Serial.println(strBuf.indexOf("ef"),2); // return 4
Serial.println(strBuf.indexOf("ef"),5); // return -1

//int string1.lastIndexOf(string string2, int from)
String strBuf = "abcdefghijk";
Serial.println(strBuf.lastIndexOf('e', 8));  // return 4
Serial.println(strBuf.lastIndexOf('e', 3));  // return -1

//int string.length()
String strBuf = "abcdefghi";
Serial.println(strBuf.length());  // return 9

//string string.remove(int index)
//string string.remove(int index, int count)
String strBufA = "abcdefg";
String strBufB;
String strBufC;
strBufB = strBufA.remove(2); //setBufB = "abdefg"
strBufC = strBufA.remove(2,2); //strBufC = abefg"

//string string.replace(string substring1, string substring2)
String strBuf = "abcdefg";
Serial.println(strBuf.replace("de", "DE"));  // return abcDEfg

//void string.reserve(int size)
String strBuf;
strBuf.reserve(26); //buffer size is 26 byte
strBuf = "i=";
strBuf += "1234";
strBuf += ", is that ok?";

//boolean string1.startsWith(string string2)
boolean firstStr;
String strBuf = "abcde";
firstString = strBuf.startsWith("ab");  // return true
firstString = strBuf.startsWith("ef");  // return false

//string string.substring(int from, int to)
String strBuf = "abcdefgh";
Serial.println(strBuf.substring(3));  // return defgh
Serial.println(strBuf.substring(3, 5));  // return de

//string string.setCharAt(int index, char c)
String strBuf = "abcdefg";
strBuf.setCharAt(2, 'C');
Serial.println(strBuf); // return abCdefg

//string string.toCharArray(byte buffer, int length)
String strBuf = "ABCD";
byte byteBuf;
strBuf.toCharArray(byteBuf,5);  // byteBuf is ABCD

//int string.toInt()
String strBuf = "123"
int intBuf;
intBuf = strBuf.toInt(); // intBuf = 123

//float string.toFloat()
String strBufA = "123.45";
String strBufB = "123";
String strBufC = "123.456";
String strBufD = "123abc";
float fltBufA = strBufA.toFloat();  //fltBufA = 123.45
float fltBufB = strBufB.toFloat();  //fltBufB = 123.00
float fltBufC = strBufC.toFloat();  //fltBufC = 123.45
float fltBufD = strBufD.toFloat();  //fltBufD = 123.00

//string string.toLowerCase()
String strBuf = "AbCdE";
Serial.println(strBuf.substring(3));  // return abcde

//string string.toUpperCase() 
String strBuf = "AbCdE";
Serial.println(strBuf.substring(3));  // return ABCDE

//string string.trim()
String strBuf1 = "\n abc \n";
String strBuf2 = strBuf1.trim();
Serial.print(strBuf2);  // return abc

//Arduino Sketch Example: Straing Class, String Operators
//Date: 2015.1.12
//Edited and Modified by: easy labo
//Original Source: Arduino Reference (http://arduino.cc/en/Reference/HomePage)

//String Index
String strBuf = "abcd";
strBuf[2] = 'C';
Serial.println(strBuf);  // return abCd

//String Addition Operator
String strBuf1 = "ab";
String strCuf2 = "cd";
strBuf1 += 12;
Serial.println(strBuf1);  // return ab12
Serial.println(strBuf1 + strBuf2); // return ab12cd

//==
//This is the same as string.equals()
String strBuf1 = "abc";
String strBuf2 = "abc";
String strBuf3 = "abd";

boolean sameString;
if(strBuf1 == stringBuf2){
   sameString = true; // return true
}else{
   sameString = false;
}

if(strBuf1 == stringBuf3){
   sameString = true;
}else{
   sameString = false; // return false
}