本文目錄一覽：
- 1、一個簡單的Java程序代碼？
- 2、求簡單JAVA程序代碼，能操作的，簡單的計算器有計算功能+-*/就行越簡單越好！！！急！！！
- 3、java簡單代碼
- 4、求一Java代碼，要簡單的。大概一百多行的的。
一個簡單的Java程序代碼？
package com.zpp;public class Charge {
public static void main(String [] args) {
if(args.length ==0) {
System.out.println(“parameter error!”);
System.out.println(“java com.zpp.Charge [int]”);
return;
}
int min = Integer.parseInt(args[0]);
double money = 0.0;
if (min = 0) {
money =0.0;
System.out.println(“not money”);
} else if (min = 60) {
money = 2.0;
} else {
money = 2.0 + (min – 60) * 0.01;
}
System.out.println(“please pay: ” + money);
}
} 編譯：javac -d . Charge.java運行：java com.zpp.Charge 111
求簡單JAVA程序代碼，能操作的，簡單的計算器有計算功能+-*/就行越簡單越好！！！急！！！
public static void main(String[] args) {
String st = “”;
計算器 j = new 計算器();
boolean t = true;
while (t) {
System.out.print(“請輸入計算代碼：”);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
st = br.readLine();
} catch (IOException ex) {
Logger.getLogger(計算器.class.getName()).log(Level.SEVERE, null, ex);
}
if (st.equals(“end”)) {
t = false;
} else if (!st.equals(“”)) {
j.處理(st);
}
}
}
public void 處理(String st) {
if (st.indexOf(“+”) != -1) {
加(符號處理(st, “+”));
} else if (st.indexOf(“-“) != -1) {
減(符號處理(st, “-“));
} else if (st.indexOf(“*”) != -1) {
乘(符號處理(st, “*”));
} else if (st.indexOf(“/”) != -1) {
除(符號處理(st, “/”));
}
}
public int[] 符號處理(String st, String s) {
int[] i = new int[2];
i[0] = Integer.parseInt(st.substring(0, st.indexOf(s)));
i[1] = Integer.parseInt(st.substring(st.indexOf(s) + 1));
return i;
}
public void 加(int x[]) {
System.out.println(x[0] + “+” + x[1] + “=” + (x[0] + x[1]));
}
public void 減(int[] x) {
System.out.println(x[0] + “-” + x[1] + “=” + (x[0] – x[1]));
}
public void 乘(int[] x) {
System.out.println(x[0] + “*” + x[1] + “=” + x[0] * x[1]);
}
public void 除(int x[]) {
if (x[1] == 0) {
System.out.print(“除數不能為零”);
return;
}
System.out.println(x[0] + “/” + x[1] + “=” + x[0] / x[1]);
}
可以運行：輸入示例：55+62
java簡單代碼
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String str = “”;
System.out.println(“請輸入指令:”);
while(true){
str = sc.next();
if(str.equals(“add”)){
System.out.println(“執行兩數相加”);
} else if(str.equals(“sub”)){
System.out.println(“執行兩數相減”);
} else if(str.equals(“help”)){
System.out.println(“add:兩數相加 sub:兩數相減”);
} else {
System.out.println(“請輸入正確指令:”);
}
}
}
你看看這段行不行
求一Java代碼，要簡單的。大概一百多行的的。
題目：一球從100米高度自由落下，每次落地後反跳回原高度的一半；再落下，求它在 第10次落地時，共經過多少米？第10次反彈多高？
這個題目，下面我會貼出來兩種代碼。其實這個題目，我煩了簡單計算，想搞得有趣味性一點，結果耽誤了好幾天時間，最後發現搞的也不好。
先第一種，為了解題而解題。
==== Main.java ====
public class Main {
private double TotalHeight = 100;
private double CurHeight = 50;
public void drop(int times) {
if ((times – 1) == 0) {
return;
}
setTotalHeight(getTotalHeight() + 2 * getCurHeight());
setCurHeight(getCurHeight() / 2);
drop(times – 1);
}
public double getTotalHeight() {
return TotalHeight;
}
public void setTotalHeight(double totalHeight) {
TotalHeight = totalHeight;
}
public double getCurHeight() {
return CurHeight;
}
public void setCurHeight(double curHeight) {
CurHeight = curHeight;
}
public static void main(String[] args) {
Main main = new Main();
main.drop(2);
System.out.println(“Total height is ” +
main.getTotalHeight());
System.out.println(“Current height is ” +
main.getCurHeight());
}
}
==== 然後是第二種 =====
==== Main.java ====
package main;
import javax.swing.JFrame;
import panel.BallPanel;
import time.Delay;
public class MainFrame extends JFrame {
public MainFrame(String title) {
super(title);
}
public static void main(String[] args) {
Delay delay = new Delay();
MainFrame frame = new MainFrame(“Hello JFrame”);
BallPanel ballPanel = new BallPanel();
frame.add(ballPanel);
frame.setSize(500, 500);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
delay.initDelay();
ballPanel.setDelay(delay.getDelay());
ballPanel.loopDrop(0);
}
}
==== Delay.java ====
package time;
public class Delay {
public void initDelay() {
int g = 10;
int i = 0;
double s, t, t0 = 0.0;
delay = new int[100];
for (s = 100; s 10100; s += 100) {
t = Math.sqrt(2 * s / g);
delay[i++] = (int) ((t – t0) * 100);
t0 = t;
}
}
public int[] getDelay() {
return delay;
}
private int delay[];
}
==== BallPanel.java ====
package panel;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JPanel;
public class BallPanel extends JPanel {
public BallPanel() {
super();
}
public void paint(Graphics g) {
g.clearRect(0, 0, this.getWidth(), this.getHeight());
g.setColor(Color.BLUE);
g.fillOval(250, ballCenter, 30, 30);
}
public void loopDrop(int height) {
int i;
if (this.height == height) { // At bottom
for (i = 0; i targetHeight; i += MUL) {
ballCenter = this.height – i;
this.repaint();
try {
Thread.sleep(delay[(targetHeight – i – 1) / MUL]);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
loopDrop(this.height – i);
} else { // At top
for (i = height; i this.height; i += MUL) {
ballCenter = i;
this.repaint();
try {
Thread.sleep(delay[(i – height) / MUL]);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
targetHeightV = targetHeightV / 2;
targetHeight = targetHeightV;
if (targetHeight != 0) {
loopDrop(i);
}
}
}
public void setDelay(int delay[]) {
this.delay = delay;
}
private int extracted() {
return 100 * MUL;
}
private int targetHeight = extracted();
private int targetHeightV = extracted();
private int ballCenter = 0;
private int height = extracted();
private int delay[];
private final int MUL = 4;
}
其實所謂的第二種，是用的JFrame在JPanel上畫圖，直觀的展示出來每次彈起來的效果。因為100像素實在太小了，所以我做了一個變數MUL，相
當於是等比例擴大的效果。問題就是彈不到10次距離就用光了，所以。。。。。權當娛樂了。。當然可以等比例在放大，例如100M看成是10000像素，這
樣能多彈幾次。這個程序，最後球就在那裡不動了，程序不會自己退出。
原創文章，作者：小藍，如若轉載，請註明出處：https://www.506064.com/zh-tw/n/193498.html
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