java设计一个窗体应用程序单击生成按钮要求产生100以内20个随机整数，将 java 编写一C程序，随机生成20个1 ～ 100的随机整...
\u7528java\u7a0b\u5e8f\u968f\u673a\u751f\u621020\u4e2a100\u4ee5\u5185\u7684\u6574\u6570import java.util.ArrayList;
import java.util.List;
public class Text {
public static void main(String[] args){
int temp = 0;
List odd = new ArrayList();
List even = new ArrayList();
for(int i=0;i<20;i++){
temp = (int) (Math.random()*99+0);
while(isExist(temp,odd,even)){
temp = (int) (Math.random()*99+0);
}
if(temp%2==0){
even.add(temp);
}else{
odd.add(temp);
}
}
System.out.println(odd.toString());
System.out.println(even.toString());
}
private static boolean isExist(int temp,List odd,List even){
if(odd.indexOf(temp)>0||even.indexOf(temp)>0){
return true;
}else{
return false;
}
}
}
\u60f3\u8981\u6570\u7ec4\u7684\u8bdd\uff0cList.toArray()\u5c31\u53ef\u4ee5\u4e86
import java.util.Random;
public class Test {
public static void main(String[] args) {
int sum=0;//\u548c
int max=0;//\u6700\u5927\u503c
int row=0;//\u884c
int col=0;//\u5217
Random rand=new Random();
int[][]arry=new int[5][4];
//\u7ed9\u6570\u7ec4\u8d4b\u503c\u5e76\u8f93\u51fa
for(int i=0;i<5;i++) {
for(int j=0;j<4;j++) {
arry[i][j]=rand.nextInt(100);
System.out.print(arry[i][j]+",");
if(j==3) {
System.out.print("\n");
}
}
}
//\u6c42\u6bcf\u884c\u7684\u548c\u503c\u548c\u5e73\u5747\u503c
for(int i=0;i<5;i++) {
sum=0;
for(int j=0;j<4;j++) {
sum+=arry[i][j];
}
System.out.println("\u7b2c"+(i+1)+"\u884c\u7684\u548c\u4e3a\uff1a"+sum+",\u5747\u503c\u4e3a\uff1a"+(sum/4));
}
//\u6c42\u6700\u5927\u503c\uff0c\u53ca\u5176\u6240\u5728\u7684\u884c\u4e0e\u5217
for(int i=0;i<5;i++) {
for(int j=0;j<4;j++) {
if(max<arry[i][j]) {
max=arry[i][j];
}
}
}
System.out.println("\u6700\u5927\u503c\u4e3a\uff1a"+max);
ok:
for(int i=0;i<5;i++) {
for(int j=0;j<4;j++){
if(max==arry[i][j]) {
row=i+1;//\u6570\u7ec4\u4e0b\u6807\u4ece0\u5f00\u59cb\u6240\u4ee5\u6570\u884c\u7684\u65f6\u5019+1
col=j+1;//\u540c\u4e0a
break ok;//\u8df3\u51fa\u591a\u91cd\u5faa\u73af
}
}
}
System.out.println("\u6700\u5927\u503c\u6240\u5728\u7684\u884c\uff1a"+row+",\u5217:"+col);
}
}
Java程序：
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextArea;
public class Main extends JFrame implements ActionListener {
protected JButton btnGenerate;
protected JTextArea txtResult;
public static void main(String[] args){
new Main();
}
public Main() {
super("随机数成品器");
initComponent();
}
public void initComponent() {
btnGenerate = new JButton("生成");
txtResult = new JTextArea(20, 50);
this.setLayout(new BorderLayout());
this.add("North", btnGenerate);
this.add("Center", txtResult);
this.setSize(300, 450);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
btnGenerate.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent arg0) {
JButton btn = (JButton) arg0.getSource();
if(btn == btnGenerate) {
int[] arr = getRandom(1, 100, 20);
Arrays.sort(arr);
StringBuilder str = new StringBuilder();
for(int i=0; i<arr.length-1; i++) {
str.append(arr[i] + "
");
}
str.append(arr[arr.length-1]);
txtResult.setText(str.toString());
}
}
//返回min..max之间的size个随机数
public static int[] getRandom(int min, int max, int size) {
Random rand = new Random();
int[] arr = new int[size];
for(int i=0; i<arr.length; i++) {
arr[i] = rand.nextInt(max);
}
return arr;
}
}
运行测试：
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