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class StaticTest { static int a =10; int b=20; } class StaticTest01 { public static void main(String [] args) { System.out.println(StaticTest.a); StaticTest s1 =new StaticTest(); StaticTest s2= new StaticTest(); System.out.println(s1.a+" "+s2.a); System.out.println(s1.b+" "+s2.b); s1.a=100; System.out.println(s1.a); System.out.println(s2.a); s1.b=200; System.out.println(s1.b); System.out.println..

import java.util.*; class Calc { public int a,b; public Calc(int a,int b){ this.a=a; this.b=b; } public void option(String opt) { if (opt.equals("+")) { this.plus(); } else if (opt.equals("-")) { this.minus(); } else if (opt.equals("/")) { this.nanum(); } else if (opt.equals("*")) { this.gob(); } else { } } public void plus() { System.out.printf("더한 결과 :%d\n",this.a+this.b); } public void minus(..

import java.util.*; import java.io.*; class WebDB { private String name; privateString id; privateString pw; //이름 관련 public WebDB(){ } public WebDB(String a){ this.name=a; } public WebDB(String a,String b){ this.name=a; this.id=b; } public WebDB(String a,String b,String c){ this.name=a; this.id=b; this.pw=c; } void setName(String a) { name=a; } String getName(String a) { setName(a); return name;..

import java.util.*; class Members{ public static void main(String [] arg){ Scanner scan=new Scanner("김 2 3 4 5"); //공백별로 짤라서 저장하고 있음 while(scan.hasNext())//다음 내용이 있는 동안 루프 { System.out.println(scan.next()); // 이때는 아무거나 다 받음 nextInt 는 인트형만 } scan =new Scanner(System.in); int a =scan.nextInt();//이건 인트형 System.out.println(a); String b=scan.next(); System.out.println(b); } }

class WebDB { private String name; privateString id; privateString pw; //이름 관련 public WebDB(){ } public WebDB(String a){ this.name=a; } public WebDB(String a,String b){ this.name=a; this.id=b; } public WebDB(String a,String b,String c){ this.name=a; this.id=b; this.pw=c; } void setName(String a) { name=a; } String getName(String a) { setName(a); return name; } //아이디 관련 void setID(String a) { id=..

class CirTest { private double r; double temp; CirTest(double a){ this.r=a; } public double setR(double a) { r=a; return r; } public double rCal() { temp=r*6.28; return temp; } public double r2Cal() { temp=r*r*3.14; return temp; } } class Circle { public static void main(String[] args) { CirTest jh=new CirTest(10); System.out.println("넓이는"+jh.r2Cal()); System.out.println("원주는"+jh.rCal()); } }

class WebDB { private String name; privateString id; privateString pw; //이름 관련 void setName(String a) { name=a; } String getName(String a) { setName(a); return name; } //아이디 관련 void setID(String a) { id=a; } StringgetID(String a) { setID(a); return id; } // 패스워드 관련 void setPW(String a) { pw=a; } StringgetPW(String a) { setPW(a); return id; } //부울형 boolean passOK(String a, String b){ if (pw==a &&..

import java.io.*; class Set_Cash{ String Name="이준호";//하나는 일괄 적으로 정해지는 변수를 만들어봤습니다 . private int cash; private int in; private int out; void Cash(int a){//여기에 Static 붙이면 에러 cash=a; } int Cash(){//메소드 오버로딩 return cash; } void In(int a) { in=a; } int In() {//메소드 오버로딩 cash+=in; return cash; } void Out(int a) { in=a; } int Out() {//메소드 오버로딩 cash-=in; return cash; } } class Cash { public static void m..

class Numbers { private int numbers[]; private int sum; private double avg; public void setNumbers(int[] nums){ numbers = nums; } public void sumClac() { // 합계를 구하는 메서드 for (int cnt = 0; cnt < numbers.length; cnt++) sum += numbers[cnt]; } public void avgClac() { // 평균을 구하는 메서드 sumClac(); avg = (double)sum / numbers.length; } public int getSum(){ return sum; } public double getAvg(){ return avg; ..

class NumBer { private int num1; private int num2; public void swap() { int swap=num1; num1=num2; num2=swap; } public void getNum1 (int new_num) { num1=new_num; } public int getNum1() { return num1; } public void getNum2 (int new_num) { num2=new_num; } public int getNum2() { return num2; } } public class NumBerTest { public static void main (String [] args) { NumBer a; a= new NumBer(); a.getNum1..