81,092
社区成员
发帖
与我相关
我的任务
分享java i = 1,2.。。。10，那么xi = x1,x2...x10该如何实现
在java 中 如果i = 1,2.。。。10，那么令xi = x1,x2...x10该如何实现。已知j = 1.。。。10，那么shape aj = new Rectanrle2D.Double(xj,yj,cj,kj);该如何实现
...全文
请发表友善的回复…
发表回复
海涅 2017-09-20
- 打赏
- 举报
用数组不就好了
swtongxue 2017-09-20
- 打赏
- 举报
可以说得具体一点吗？？我就算是刚入门，不知道您说的这是什么意思
swtongxue 2017-09-20
- 打赏
- 举报
这样是不行的，我想用的xj，yj，cj，kj都是int类型，现在得到的是String了，即使强制转换了也是不可以的呢
cyh_syp 2017-09-20
- 打赏
- 举报
Map<String,Integer> map = new HashMap<String,Integer>();
for(int i=1;i<=12;i++){
map.put("x"+i, i);
}
System.out.println("x12="+map.get("x12"));
System.out.println"x12类型:"+map.get("x12").getClass());
//结果：
x12=12
x12类型:class java.lang.Integer
cyh_syp 2017-09-20
- 打赏
- 举报
int x12 = (int)(20 + Math.random() * (396 - 20 + 1));
你是想创建12这样的参数？
cyh_syp 2017-09-18
- 打赏
- 举报
int j = 1;
String str1 = "x"+j;
String str2 = "y"+j;
String str3 = "c"+j;
String str4 = "k"+j;
shape aj = new Rectanrle2D.Double(str1,str2,str3,str4);
阿尔法程序狗 2017-09-17
- 打赏
- 举报
用可变参接收实参试试?
swtongxue 2017-09-16
- 打赏
- 举报
我的代码
package lw1.view;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.io.FileWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Random;
import java.util.Vector;
import java.awt.*;
import javax.swing.*;
import lw1.db.SqlHelper;
import lw1.model.AreaModel;
import lw1.tools.MyTools;
public class HuaTu extends JDialog implements ActionListener{
int i = 0;
int j = 1;
int k = 0;
int a = 0;
int hgap = 10;
int vgap = 10;
//定义swin组件
JButton jb1,jb2,jb3,jb4,jb5;
JPanel jp1,jp2,jp3,jp4,jp5,jp6,jp7;
JTextField jtf1,jtf2,jtfi,jtfj,jtfk;
JLabel p5_jl1,p5_jl2,p5_jl3,p5_jl4,p6_jl1,p6_jl2,p6_jl3,p6_jl4,p6_jli,p6_jlj,jlk;
JTable jt = null;
JScrollPane jsp = null;
int s = 0;
AreaModel ht = null;
DrawRectanglePanel rectPanel = new DrawRectanglePanel(); // 创建面板类的实例
Random rand = new Random();
int xj = 0;int yj = 0;int cj = 0;int kj = 0;
int x1 = (int)(20 + Math.random() * (360 - 20 + 1));
int y1 = (int)(20 + Math.random() * (140 - 20 + 1));
int c1 = 60;int k1 = 80;
int x2 = (int)(20 + Math.random() * (396 - 20 + 1));
int y2 = (int)(20 + Math.random() * (170 - 20 + 1));
int c2 = 24;int k2 = 50;
int x3 = (int)(20 + Math.random() * (396 - 20 + 1));
int y3 = (int)(20 + Math.random() * (170 - 20 + 1));
int c3 = 24;int k3 = 50;
int x4 = (int)(20 + Math.random() * (390 - 20 + 1));
int y4 = (int)(20 + Math.random() * (180 - 20 + 1));
int c4 = 30;int k4 = 40;
int x5 = (int)(20 + Math.random() * (380 - 20 + 1));
int y5 = (int)(20 + Math.random() * (148 - 20 + 1));
int c5 = 40;int k5 = 72;
int x6 = (int)(20 + Math.random() * (380 - 20 + 1));
int y6 = (int)(20 + Math.random() * (148 - 20 + 1));
int c6 = 40;int k6 = 72;
int x7 = (int)(20 + Math.random() * (396 - 20 + 1));
int y7 = (int)(20 + Math.random() * (170 - 20 + 1));
int c7 = 24;int k7 = 50;
int x8 = (int)(20 + Math.random() * (390 - 20 + 1));
int y8 = (int)(20 + Math.random() * (140 - 20 + 1));
int c8 = 30;int k8 = 80;
int x9 = (int)(20 + Math.random() * (396 - 20 + 1));
int y9 = (int)(20 + Math.random() * (180 - 20 + 1));
int c9 = 24;int k9 = 40;
int x10 = (int)(20 + Math.random() * (380 - 20 + 1));
int y10 = (int)(20 + Math.random() * (180 - 20 + 1));
int c10 = 40;int k10 = 40;
int x11 = (int)(20 + Math.random() * (260 - 20 + 1));
int y11 = (int)(20 + Math.random() * (100 - 20 + 1));
int c11 = 160;int k11 = 120;
int x12 = (int)(20 + Math.random() * (396 - 20 + 1));
int y12 = (int)(20 + Math.random() * (170 - 20 + 1));
int c12 = 24;int k12 = 50;
//
public HuaTu(Frame owner, String title, boolean modal){
super(owner,title,modal);
jp3 = new JPanel(new GridLayout(2,1,hgap,vgap));
jb1 = new JButton("生成");
jb1.addActionListener(this);
jb2 = new JButton("删除");
jb2.addActionListener(this);
jp3.add(jb1);
jp3.add(jb2);
jp2 = new JPanel(new BorderLayout());
jp2.add(jp3,"North");
jp5 = new JPanel(new BorderLayout());
jp5.add(rectPanel);
jp1 = new JPanel(new BorderLayout());
jp1.add(jp2,"East");
jp1.add(jp5,"Center");
jp4 = new JPanel(new FlowLayout(FlowLayout.RIGHT));
jb3 = new JButton("确定");
jb3.addActionListener(this);
jb4 = new JButton("取消");
jb4.addActionListener(this);
jp4.add(jb3);
jp4.add(jb4);
this.setLayout(new BorderLayout());
//this.add(jsp);
this.add(jp1, BorderLayout.CENTER);
this.add(jp4, BorderLayout.SOUTH);
//展现
this.setSize(600,400);
this.setLocation(250, 100);
//this。setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
}
class DrawRectanglePanel extends JPanel { // 创建内部面板类
public void paintComponent(Graphics g) { // 重写paint()方法
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
Shape a0 = new Rectangle2D.Double(20,20,400,200);
Area b0 = new Area(a0);
int[] ary = new int[10];
// 集合 ,临时集合temp存放1~10个数字
ArrayList<Integer> temp = new ArrayList<Integer>();
//list集合存放需要的数字
ArrayList<Integer> list = new ArrayList<Integer>();
// 给集合添加1~10的数字
for (int i = 1; i < 11; i++) {
temp.add(i);
}
// while循环 随即抽取集合的数字给数组
int index = 0;
while (true) {
if(list.size()==10){
break;
}
int it = temp.get((int) (Math.random() * 10));
//如果list存在这个数组就继续循环
if (list.contains(it)) {
continue;
} else {
//如果list不存在这个数字，那么就把这个数字给数组，并且在list中加入这个数字
ary[index] = it;
list.add(it);
index++;
}
}
// /输出数组的元素
for (int i = 0; i < ary.length; i++) {
//System.out.print(ary[i] + " ");
int j = 0;
j = ary[i];
String s = "x" + j;
int ss = Integer.parseInt(s);
Shape a = new Rectangle2D.Double(ss,yj,cj,kj);
Area bj = new Area(a);
//System.out.println(str);
g2.draw(b0);
g2.draw(bj);
}
}
}
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
}
}
swtongxue 2017-09-16
- 打赏
- 举报
我这里面aj,xj,yj,cj,kj都涉及到这个问题
swtongxue 2017-09-16
- 打赏
- 举报
那我想用在这里shape aj = new Rectanrle2D.Double(xj,yj,cj,kj);该如何实现呢
cyh_syp 2017-09-16
- 打赏
- 举报
int j = 1;
String str= "x"+j;
