PROGRAM class DemoAppend { sb.length()); public static void main(string[] args) {

//PROGRAM 11-28

System.out.println("Ruang yang telah diisi string: "+

class DemoAppend { sb.length()); public static void main(String[] args) { }

StringBuffer sb = new StringBuffer("Pemrograman");

}

char spasi = ' '; String bahasa = "Java";

//PROGRAM 11-21

int versi = 2;

class DemoCariString {

sb.append(spasi).append(bahasa).append(spasi).

public static void main(String[] args) {

append(versi); String s = "Tutorial Java: " + System.out.println(sb.toString()); "Kursus Singkat Pemrograman Java"; }

System.out.println("s = \"" + s + "\"");

}

System.out.println(); System.out.println("s.indexOf(\'J\')

:" +

//PROGRAM 11-22 s.indexOf('J')); class DemoArgumenCommandLine { System.out.println("s.indexOf(\"Java\") public static void main(String[] args) {

:" +

s.indexOf("Java")); for (int i=0; i<args.length; i++) { System.out.println("s.lastIndexOf(\'J\')

: "+

System.out.println("Argumen ke-" + i + " s.lastIndexOf('J'));

: " +args[i]);

System.out.println("s.lastIndexOf(\"Java\") : " +

}

s.lastIndexOf("Java"));

}

System.out.println();

}

System.out.println("s.indexOf(\'J\', 10) s.indexOf('J', 10));

//PROGRAM 11-23 class DemoCapacityLength {

:" +

System.out.println("s.indexOf(\"Java\", 10)

:"

+ public static void main(String[] args) { s.indexOf("Java", 10)); StringBuffer sb = new StringBuffer("Java"); System.out.println("s.lastIndexOf(\'J\', 15) : " + System.out.println("Kapasitas karakter: " + s.lastIndexOf('J', 15)); sb.capacity());

System.out.println("s.lastIndexOf(\"Java\", 15) : "

}

+ s.lastIndexOf("Java", 15)); //PROGRAM 11-9 } class DemoCharAt3 { }

public static String initCap(String s) { boolean awalKata = true;

//PROGRAM 11-7 char ch; class DemoCharAt1 { String temp = s.toLowerCase(); public static void main(String[] args) { String hasil = ""; String s = "Java"; for (int i=0; i
s.charAt(0));

if (awalKata) {

System.out.println("Karakter kedua : " + s.charAt(1));

hasil += (char) (ch-32);

System.out.println("Karakter ketiga : " + s.charAt(2));

} else {

System.out.println("Karakter keempat : " +

hasil += ch;

s.charAt(3)); }

}

if (ch != ' ') { // memeriksa karakter spasi

}

awalKata = false; } else {

//PROGRAM 11-8

awalKata = true;

class DemoCharAt2 { }

public static void main(String[] args) { }

System.out.println("Karakter pertama : " + "Java".charAt(0)); System.out.println("Karakter kedua : " +

return hasil; }

"Java".charAt(1)); public static void main(String[] args) { System.out.println("Karakter ketiga : " + Java".charAt(2)); System.out.println("Karakter keempat : " + "Java".charAt(3)); }

// Memanggil method initCap() System.out.println(initCap("contoh string pertama"));

System.out.println(initCap("CONTOH STRING KEDUA"));

System.out.println("Menggunakan compareTo():");

System.out.println(initCap("cONToh stRIng KEtiGa"));

bandingkan("MIRA", "mira", false); bandingkan("fira", "FIRA", false);

} bandingkan("KIKI", "KIKI", false); }

System.out.println("\nMenggunakan compareToIgnoreCase():");

//PROGRAM 11-18

bandingkan("MIRA", "mira", true);

class DemoCompareTo {

bandingkan("fira", "FIRA", true);

public static void bandingkan(String str1, String

bandingkan("KIKI", "KIKI", true);

str2, } boolean ignoreCase) { } int hasil; if (ignoreCase) { //PROGRAM 11-30 hasil = str1.compareToIgnoreCase(str2); class DemoDelete { } else { public static void main(String[] args) { hasil = str1.compareTo(str2); }

StringBuffer sb = new StringBuffer("Pemrograman C dan Java");

if (hasil < 0) {

System.out.println("Sebelum dihapus:");

System.out.println("\"" + str1 +

System.out.println(sb.toString() + '\n');

"\" lebih kecil dari \"" + str2 + "\"");

sb.deleteCharAt(12); System.out.println("Setelah karakter ke-12

} else if (hasil == 0) {

dihapus:"); System.out.println("\"" + str1 + System.out.println(sb.toString() + '\n'); "\" sama dengan \"" + str2 + "\""); //yang akan dihapus dari 12 sampai 16 (bukan } else /* if (hasil > 0) */ {

17)

System.out.println("\"" + str1 +

sb.delete(12, 17);

"\" lebih besar dari \"" + str2 + "\"");

System.out.println("Setelah karakter ke-12 " +

}

"sampai 16 dihapus:");

} public static void main(String[] args) {

System.out.println(sb.toString()); }

}

System.out.println("Kapasitas setelah diset : " + sb2.capacity());

//PROGRAM 11-24 class DemoEnsureCapacity1 {

} }

public static void main(String[] args) { StringBuffer sb = new StringBuffer();

//PROGRAM 11-15

System.out.println("Kapasitas awal : " +

class DemoEquals {

sb.capacity()); public static void main(String[] args) { // menentukan kapasitas baru String s1 = "Java"; sb.ensureCapacity(25); String s2 = "JAVA"; System.out.println("Kapasitas setelah diset : " + String s3 = "Java"; sb.capacity()); String s4 = "C++"; } System.out.println("s1 sama dengan s2 : " + s1.equals(s2));

}

System.out.println("s1 sama dengan s3 : " + //PROGRAM 11-25

s1.equals(s3)); System.out.println("s1 sama dengan s4 : " + class DemoEnsureCapacity2 {

s1.equals(s4));

public static void main(String[] args) { StringBuffer sb1 = new StringBuffer();

} }

StringBuffer sb2 = new StringBuffer(6); System.out.println("Pada objek sb1"); System.out.println("Kapasitas awal : " + sb1.capacity());

//PROGRAM 11-16 class DemoEqualsIgnoreCase { public static void main(String[] args) {

sb1.ensureCapacity(10); String s1 = "Java"; System.out.println("Kapasitas setelah diset : " + String s2 = "JAVA"; sb1.capacity()); String s3 = "Java"; System.out.println("\nPada objek sb2"); System.out.println("Kapasitas awal : " + sb2.capacity()); sb2.ensureCapacity(4);

String s4 = "C++"; System.out.println("s1 sama dengan s2 : " + s1.equalsIgnoreCase(s2));

System.out.println("s1 sama dengan s3 : " +

System.out.println(arrKarakter); System.out.println("Karakter pertama : " +

s1.equalsIgnoreCase(s3));

arrKarakter[0]); System.out.println("s1 sama dengan s4 : " + System.out.println("Karakter kedua : " + s1.equalsIgnoreCase(s4)); }

arrKarakter[1]); System.out.println("Karakter ketiga : " + arrKarakter[2]);

}

System.out.println("Karakter keempat : " + arrKarakter[3]); //PROGRAM 11-11 class DemoGetBytes {

} }

public static void main(String[] args) { String s = "Pemrograman Java"; byte[] temp = new byte[s.length()];

//PROGRAM 11-29 class DemoInsert {

temp = s.getBytes();

public static void main(String[] args) {

// menampilkan isi temp for (int i=0; i
StringBuffer sb = new StringBuffer("saya menyukai Java"); char spasi = ' ';

System.out.print((char) temp[i]);

char koma = ',';

}

String s1 = "Selain C/C++ dan Pascal";

}

String s2 = "juga ";

}

sb.insert(0, s1); //PROGRAM 11-10

sb.insert(23, koma).insert(24, spasi);

class DemoGetChar {

sb.insert(30, s2); System.out.println(sb.toString());

public static void main(String[] args) { }

String s = "Pemrograman Java"; int indeksAwal = 12;

}

int indeksAkhir = 16; char[] arrKarakter = new char[indeksAkhirindeksAwal]; s.getChars(indeksAwal, indeksAkhir, arrKarakter, 0);

//PROGRAM 11-1 class DemoMembuatString { public static void main(String[] args) {

//PROGRAM 11-20 char[] arr = {'a','b','c','d','e'};

class DemoPerbedaanEquals2 {

String s1 = "Contoh string literal";

public static void main(String[] args) { String str1 = new String("Java"); // objek String

String s2 = new String(); String s3 = new String(arr);

pertama String str2 = str1; // mengacu ke objek String

String s4 = new String(arr, 1, 3);

yang ditunjuk

String s5 = new String(s1);

// oleh str1

System.out.println("s1: " + s1);

boolean b1 = str1.equals(str2);

System.out.println("s2: " + s2);

boolean b2 = (str1 == str2);

System.out.println("s3: " + s3);

System.out.println("Menggunakan method

System.out.println("s4: " + s4); System.out.println("s5: " + s5);

equals() : " + b1); System.out.println("Menggunakan operator == : " + b2);

}

}

}

}

//PROGRAM 11-19 class DemoPerbedaanEquals1 {

//PROGRAM 11-17 class DemoRegionMatches {

public static void main(String[] args) {

public static void main(String[] args) {

String str1 = new String("Java"); // objek String

String s1 = "mira raharjo";

pertama

String s2 = "ASFIRA FAUZIYYAH";

String str2 = new String("Java"); // objek String kedua

boolean b1 = s1.regionMatches(1, s2, 3, 3);

boolean b1 = str1.equals(str2); boolean b2 = (str1 == str2); System.out.println("Menggunakan method equals() : " + b1); System.out.println("Menggunakan operator == : " + b2);

boolean b2 = s1.regionMatches(true, 1, s2, 3, 3); System.out.println("Menggunakan bentuk pertama : " + b1); System.out.println("Menggunakan bentuk kedua : " + b2); }

} }

}

//PROGRAM 11-14

System.out.println(sb.toString());

class DemoReplace { public static void main(String[] args) {

} }

String s1 = "Pemrograman Java"; String s2 = s1.replace("Pemrograman", "Program");

//PROGRAM 11-33 class DemoReverse {

String s3 = "Java".replace('v', 'w'); public static void main(String[] args) { System.out.println("s2 : " + s2); System.out.println("s3 : " + s3);

StringBuffer sb = new StringBuffer("Pemrograman Java");

}

System.out.println("Sebelum dibalik:");

}

System.out.println(sb.toString() + '\n'); sb.reverse();

//PROGRAM 11-31

System.out.println("Setelah dibalik:");

class DemoReplace1 {

System.out.println(sb.toString());

public static void main(String[] args) { StringBuffer sb = new StringBuffer("Java");

} }

sb.replace(1, 2, "o"); sb.replace(2, 3, "w");

//PROGRAM 11-2

sb.replace(3, 4, "o");

class DemoSambungString1 {

System.out.println(sb.toString());

public static void main(String[] args) { String teksBantuan = "Ini adalah contoh string panjang" +

} }

"yang digunakan untuk menampilkan informasi bantuan" + //PROGRAM 11-32

"di dalam program yang kita tulis";

class DemoReplace2 {

System.out.println(teksBantuan);

public static void main(String[] args) { StringBuffer sb = new StringBuffer("Java");

} }

// yang akan diganti adalah indeks ke-1 sampai 3 //PROGRAM 11-3 sb.replace(1, 4, "owo");

class DemoSambungString2 {

class DemoSetCharAt {

public static void main(String[] args) {

public static void cetakIsi(StringBuffer sb) { for (int i=0; i<sb.length(); i++) {

final int TAHUN = 1995;

System.out.println("Karakter ke-" + i +

final double PI = 3.1416;

" : " + sb.charAt(i));

char ch = 'A';

}

boolean b = true;

}

String s1 = "Java lahir pada tahun " + TAHUN;

public static void main(String[] args) {

String s2 = "Nilai konstanta PI adalah " + PI;

StringBuffer sb = new StringBuffer("Java");

String s3 = "Karakter " + ch;

System.out.println("Sebelum diset");

String s4 = "Pernyataan (1 + 1 = 2) bernilai: " +

System.out.println("sb : " + sb);

b; cetakIsi(sb); System.out.println(s1); sb.setCharAt(1, 'o'); System.out.println(s2); sb.setCharAt(2, 'w'); System.out.println(s3); sb.setCharAt(3, 'o'); System.out.println(s4); System.out.println("\nSetelah diset"); } System.out.println("sb : " + sb); } cetakIsi(sb); } //PROGRAM 11-4 } class DemoSambungString3 { public static void main(String[] args) { //PROGRAM 11-26 int a = 3; class DemoSetLength { int b = 4; public static void main(String[] args) { System.out.println("a + b = " + (a + b)); } }

StringBuffer sb = new StringBuffer("Pemrograman Java"); System.out.println("Sebelum diset"); System.out.println("sb : " + sb);

//PROGRAM 11-27

System.out.println("Lebar : " + sb.length());

sb.setLength(11);

System.out.println("dan seterusnya...");

System.out.println("\nSetelah diset"); System.out.println("sb : " + sb);

} }

System.out.println("Lebar : " + sb.length()); }

//PROGRAM 11-5

}

class MyClass { private int x;

//PROGRAM 11-13

// constructor

class DemoSubstring {

MyClass(int nilai) {

public static void main(String[] args) {

x = nilai;

String s1 = "Pemrograman Java"; String s2 = s1.substring(12);

} // melakukan override terhadap method toString()

String s3 = s1.substring(5, 9); public String toString() { System.out.println("s2 : " + s2); return "Method toString() pada kelas MyClass System.out.println("s3 : " + s3);

dipanggil";

}

}

}

public void showX() { System.out.println("Nilai x di dalam kelas

//PROGRAM 11-12

MyClass: " + x); }

class DemoToCharArray { public static void main(String[] args) { String s = "Pemrograman Java"; char[] temp = new char[s.length()];

} class DemoToString { public static void main(String[] args) { MyClass obj = new MyClass(10);

temp = s.toCharArray(); System.out.println("Karakter pertama : " + temp[0]);

// Menyambung string dengan objek dari kelas MyClass String s = "Test : " + obj;

System.out.println("Karakter kedua : " + temp[1]);

System.out.println(s);

System.out.println("Karakter ketiga : " + temp[2]);

obj.showX(); }

}

//PROGRAM 11-6 class DemoUpperLower { public static void main(String[] args) { String s = "Pemrograman Java"; String hurufKapital = s.toUpperCase(); String hurufKecil = s.toLowerCase(); System.out.println("String awal

: " + s);

System.out.println("String huruf besar : " + hurufKapital); System.out.println("String huruf kecil : " + hurufKecil); } }