Dilrong

import java.util.Scanner; /* * 1~100사이의 값 * 숫자맞추기게임 */ public class Ex5 { public static void main(String[] args) { // TODO Auto-generated method stub int answer = (int) (Math.random()*100); int input = 0; int count =0; Scanner s = new Scanner(System.in); while(true) { count++; System.out.println("1과 100사이의 값을 입력하세요 : "); input = s.nextInt(); if(input==answer){ System.out.println("정답입니다."); Syste..

/* * 숫자 받는방법 *Scanner sc = new Scanner(System.in); *int n = sc.nextInt(); *System.out.print("*") *하나만해서 풀기 */ import java.util.Scanner; public class Example1 { public static void main(String[] args) { //변수 선언부 int i = 0; int j = 0; //숫자를 받기 위한 스캐너 객체 Scanner sc = new Scanner(System.in); System.out.println("1.사각형 2.삼각형"); //스캐너 객체 사용 n에 숫자를 받음 int n = sc.nextInt(); switch(n) { //n이 1일때 case 1 : /..

import java.applet.Applet; import java.awt.Checkbox; import java.awt.CheckboxGroup; import java.awt.Color; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionAdapter; public class WhiteBoard extends Applet implements..

import java.applet.Applet; import java.awt.*; import java.awt.event.*; public class WhiteBoard extends Applet implements ItemListener { Checkbox chk1, chk2, chk3, chk4; Checkbox chk5, chk6, chk7; Color curCol = Color.black; //여러개로 할 시 배열로 변경 int x,y,w,h; public void init() { setBackground(Color.white); CheckboxGroup cbg = new CheckboxGroup(); CheckboxGroup cbg2 = new CheckboxGroup(); chk5 = new ..

import java.applet.Applet; import java.awt.*; import java.awt.event.*; public class WhiteBoard extends Applet implements ItemListener { Checkbox chk1, chk2, chk3, chk4; Checkbox chk5, chk6, chk7; Color curCol = Color.black; int x=0, y=0; public void init() { setBackground(Color.white); CheckboxGroup cbg = new CheckboxGroup(); CheckboxGroup cbg2 = new CheckboxGroup(); chk5 = new Checkbox("사각형", c..

import java.awt.*; import java.awt.event.*; public class calculator extends Frame{ //선언부분 Frame f; TextField tf; Panel numPanel; //입력받은 숫자 저장 String operator = new String(""); //입력됬던 피연산자 저장 int save = 0; Button numButton1; Button numButton2; Button numButton3; Button numButton4; Button numButton5; Button numButton6; Button numButton7; Button numButton8; Button numButton9; Button numButton10; Bu..

abstract class AbsCls{ public abstract void methodA(); void methodB() { System.out.println("Now in methodB()"); } } class ImpCls extends AbsCls { public void methodA(){ System.out.println("Now in methodA()"); } } public class MyAbsCls { public static void main(String[] args) { ImpCls obj = new ImpCls(); obj.methodA(); obj.methodB(); } }

class SuperCls{ void methodA(){ System.out.println("methodA() in Super Class"); } void methodB(){ System.out.println("methodB() in Super Class"); } } class SubCls extends SuperCls { public void methodA(){ System.out.println("methodA() in Sub Class"); } void methodB(int a) { System.out.println("methodB() in Sub Class "+a); } } public class MyCls { public static void main(String[] args) { SubCls o..

class Circle { final double PI = 3.14; double r; Circle(int r) { this.r = r; } double area(); { return PI*r*r; } } public class CircleArea { public static void main(String[] args) { double a; Circle c = new Circle(10); a = c.area(); System.out.println("원의 면적 : "+a); } } //call_by_referenceclass Circle { public double PI = 3.14; double r; public void area(Circle par) { PI = 3.14159; par.r = PI * ..

public class MyTranspose { public static void main(String[] args) { //행렬 배열 int mt[][] = new int[][]{{1,2,3}, {4,5,6}}; int i,j; //행렬 출력 for(i=0; i