COMITO

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950class Sync { synchronized void a() { //스레드의 동기화, 해당 일이 끝날 때 까지 막아라! for ( int i = 0; i

12345678910111213141516171819202122232425262728293031323334353637383940class AAA { public String toString() { return "Class A"; }} class BBB { public String toString() { return "Class B"; }} //class InstViewer {// int cnt = 0;// public void view(T inst/*, U inst2*/){// System.out.println(inst);//// System.out.println(inst2);// }//} class InstViewer { int cnt = 0; public void view(T inst, U inst2..

-Animal Interface123456789public interface Animal { int MAX_AGE_NUM = 10; // == public static final int MAX_AGE_NUM = 10; int MIN_AGE_NUM = 0; void ageUp(); // == public abstract void ageUp(); void ageDown(); } Colored by Color Scriptercs-Cat123456789101112131415161718192021222324252627282930313233343536373839public class Cat implements Animal { private String name; private int age; public Cat()..

-Parent12345678public class Parent { String name ="부모"; int age = 50; public void info() { System.out.println("name : " + name + ", age : " + age); }}Colored by Color Scriptercs-Child0112345678910111213public class Child01 extends Parent { String name = "첫째자식"; void play () { System.out.println("나는 놀거야!"); } void study () { System.out.println("공부..할게요"); } @Override public void info() { System.o..

123456789101112131415161718192021222324252627282930313233343536373839404142public class OperationMain { public static void main(String[] args) { /* * SCE(Short-Circuit Evaluation) * A수식의 연산결과가 논리연산의 결과로 * 결정된다면, B수식을 수행하지 않는다. */ int key = 2394723; int password = 1234; int sub = 0; int re = 0; // 암호화 sub = password ^ key; System.out.println(sub); // 복호화 re = sub ^ key; System.out.println(re); in..

12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152public class StringMain02 { public static void main(String[] args) { String str = "Hello World"; String result = str.substring(3, str.length()); System.out.println(str + "의 길이 : " + str.length()); System.out.println("substring(3) : " + result + "의 길이 : " + result.length()); //3의 위치부터 7전 까지 result = str..

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586public class StringMain { public static void main(String[] args) { String str = new String("Hello"); //주소비교 if(str=="Hello") { System.out.println("str == Hello"); } else { System.out.println("str != Hello"); } boolean bool = str.equals..

1234567891011121314151617181920public class StringBuf { public static void main(String[] args) { String str =""; System.out.println("[String 연산]"); long start = System.currentTimeMillis(); for ( int i = 1; i

-Util12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152import java.io.InputStream;import java.io.OutputStream;import java.io.Reader;import java.io.Writer; public class FileClose { public static void close (InputStream fis, InputStream is ) { close(fis); close(is); } public static void close (OutputStream fos, OutputStream os) { close(fos); close(os); ..

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream; public class FileMain03 { public static void write() { FileOutputStream fos = null; DataOutputStream dos = null;// OutputStr..