網路程式設計 2009/02/26 上課範例

無聊的第一堂課... /* 第一次上課範例 2009/02/26 */ import javax.swing.*; public class java001 { private int n = 0; private int sum = 0; public void setN(int x){ n = x; } public int getN(){ return n; } public void sum(){ for( int i = 1 ; i <= n ; i++ ) sum += i; } public int getSum(){ return sum; } public static void main(String args[]) { java001 j = new java001(); String s = JOptionPane.showInputDialog("n=?"); j.setN(Integer.parseInt(s)); j.sum(); JOptionPane.showMessageDialog(null,"1 ~ " + j.getN() + " = " + j.getSum(), "第一次上課範例" , JOptionPane.PLAIN_MESSAGE); } }
/* 計算1~n總和的Applet */ import java.awt.*; import java.applet.*; import javax.swing.JOptionPane; public class java002 extends Applet{ private int n = 0; private int sum = 0; Frame frm = new Frame("加總"); public void setN(int x){ n = x; } public int getN(){ return n; } public void sum(){ for( int i = 1 ; i <= n ; i++ ) sum += i; } public int getSum(){ return sum; } public void init(){ String s = JOptionPane.showInputDialog("n=?"); setN(Integer.parseInt(s)); sum(); Label lab = new Label("1到" + getN() + "加總 = " + getSum()); frm.setSize(300,400);//設定視窗的長寬 frm.add(lab);//將標籤物件lab加入視窗中 frm.setVisible(true);//將視窗顯示出來 } }