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package prj190715; import java.util.*; public class ArrayListTest { public static void main(String[] args) { ArrayList list = new ArrayList(); // 생략가능 list.add("1111"); list.add("2222"); list.add("3333"); list.add("4444"); list.add(3333); //list.add(new Integer(2)); autoboxing 기본자료형을 객체자료형으로 형변환. System.out.println(list); list.add(0, "000"); System.out.println(list); System.out.println("index"+l..

package prj190712; import java.awt.BorderLayout; import java.awt.Color; import java.awt.EventQueue; import javax.swing.*; import javax.swing.border.*; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import javax.swing.JLabel; import javax.swing.JTextField; import javax.swing.GroupLayout; import javax.swing.GroupLayout.Alignment; import javax.swing.LayoutStyle.ComponentPl..

package GUITEST; import javax.swing.*; import java.awt.*; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; public class EventTester extends Frame{ Label Xlabel; //X좌표를 나타낼 라벨 Label Ylabel; //Y좌표를 나타낼 라벨 public EventTester(){ Xlabel = new Label("0"); //신규라벨 초기값은 0 Ylabel = new Label("0");//신규라벨 초기값은 0 this.setLayout(new FlowLayout()); //layout에 나타나게 할것 this.add(Xlabel); //라벨 ..