請問怎么用 java 畫菱形~~~~~~?????????

java 輸出菱形代碼：

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package?demo;

public?class?Demo01?{

public?static?void?main(String[]?args)?{

int?i,?j,?k;

for?(i?=?1;?i?=?5;?i++)?{

for?(j?=?1;?j?=?5?-?i;?j++)

System.out.print("?");

for?(k?=?1;?k?=?2?*?i?-?1;?k++)

System.out.print("*");

System.out.println("");

}

for?(i?=?1;?i?=?4;?i++)?{

for?(j?=?1;?j?=?i;?j++)

System.out.print("?");

for?(k?=?1;?k?=?9?-?2?*?i;?k++)

System.out.print("*");

System.out.println("");

}

}

}

繪制算法：

1、分為兩部分，上半部分和下半部分

2、輸出空格部分換個(gè)輸出*部分

3、最后一個(gè)標(biāo)簽需要換行

java 怎樣寫出一個(gè)菱形程序？空心和實(shí)心

java打印菱形通過二維數(shù)組來打印，實(shí)例如下：

int?hangshu?=?11;

int?yiban?=?hangshu?/?2?+?1;

int?yibanduo?=?hangshu?/?2;

System.out.println("空心菱形：");

for(int?k?=?1;k?=?yiban;k++){

for(int?i?=?1;i?=?(yiban?-?k);i++){

System.out.print("?");

}

System.out.print("*");

for(int?i?=?1;i?=?(?(k?-?2)?*?2?+?1);i++){

System.out.print("?");

}

if(k?!=?1){

System.out.print("*");

}

System.out.println();

}

for(int?k?=?yibanduo;k?=1;k--){

for(int?i?=?1;i?=?(yiban?-?k);i++){

System.out.print("?");

}

System.out.print("*");

for(int?i?=?1;i?=?(?(k?-?2)?*?2?+?1);i++){

System.out.print("?");

}

if(k?!=?1){

System.out.print("*");

}

System.out.println();

}

System.out.println("實(shí)心菱形：");

for(int?i?=?1;i?=?hangshu;i++){

if(i?=?hangshu/2?+?1){

for(int?k?=?1;k?=?hangshu/2?+?1-?i;k++){

System.out.print("?");

}

for(int?k?=?1;k?=?i;k++){

System.out.print("*?");

}

System.out.println();

}else{

for(int?k?=1;k?=?(i?-(hangshu/2?+?1));k++){

System.out.print("?");

}

for(int?k?=?1;k?=?(2?*(hangshu/2?+?1)?-?i);k++){

System.out.print("*?");

}

System.out.println();

}

}

結(jié)果如下：

用Java編菱形圖案1357531 * *** *****

代碼如下：

/**

*

*/

package main;

/**

* @author GT

*

*/

public class Mains {

/**

*

*/

public Mains() {

// TODO Auto-generated constructor stub

}

public static void print(int size) {

if (size % 2 == 0) {

size++; // 計(jì)算菱形大小

}

for (int i = 0; i size / 2 + 1; i++) {

for (int j = size / 2 + 1; j i + 1; j--) {

System.out.print(" "); // 輸出左上角位置的空白

}

for (int j = 0; j 2 * i + 1; j++) {

System.out.print("*"); // 輸出菱形上半部邊緣

}

System.out.println(); // 換行

}

for (int i = size / 2 + 1; i size; i++) {

for (int j = 0; j i - size / 2; j++) {

System.out.print(" "); // 輸出菱形左下角空白

}

for (int j = 0; j 2 * size - 1 - 2 * i; j++) {

System.out.print("*"); // 輸出菱形下半部邊緣

}

System.out.println(); // 換行

}

}

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

print(11);

}

}

用java編寫菱形

for(i=1;i=4;i++)

{

這個(gè)小的for是打印每一行前邊的空格

for(j=1;j=4-i;j++)

System.out.print(" ");

這個(gè)是打印星星的

for(j=1;j=2*i-1;j++)

System.out.print("*");

這個(gè)是打印完一行的換行

System.out.println("");

}

下邊的是一樣的 ?只不過每一行的空格和星星數(shù) ? 和上邊是翻過來的

for(i=1;i=3;i++)

{

for(j=1;j=i;j++)

System.out.print(" ");

for(j=1;j=7-2*i;j++)

System.out.print("*");

System.out.println("");

}

java.sql.SQLException: 無效的列索引

無效的列索引

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:111)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:207)

atoracle.jdbc.driver.OraclePreparedStatement.setStringInternal(OraclePreparedStatement.java:5328)

atoracle.jdbc.driver.OraclePreparedStatement.setString(OraclePreparedStatement.java:5320)

at untitled5.addreader1.validID(addreader1.java:128)

at untitled5.addreader1.jButton1_actionPerformed(addreader1.java:97)

at untitled5.addreader1_jButton1_actionAdapter.actionPerformed(addreader1.java:175)

at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)

at javax.swing.DefaultButtonModel.setPressed(Unknown Source)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)

at java.awt.Component.processMouseEvent(Unknown Source)

at javax.swing.JComponent.processMouseEvent(Unknown Source)

at java.awt.Component.processEvent(Unknown Source)

at java.awt.Container.processEvent(Unknown Source)

at java.awt.Component.dispatchEventImpl(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)

at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source

at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)

at java.awt.Container.dispatchEventImpl(Unknown Source)

at java.awt.Window.dispatchEventImpl(Unknown Source)

at java.awt.Component.dispatchEvent(Unknown Source)

at java.awt.EventQueue.dispatchEvent(Unknown Source)

at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.pumpEvents(Unknown Source)

at java.awt.EventDispatchThread.run(Unknown Source)

代碼：String driverName = "oracle.jdbc.OracleDriver";

Driver driver = (Driver) Class.forName(driverName).newInstance();

//連接數(shù)據(jù)庫

Connection con = DriverManager.getConnection(

"jdbc:oracle:thin:@LONG:1521:orcl", "sysman", "tongfang");

PreparedStatement pstmt = con.prepareStatement(

" insert into reader values(?)");

pstmt.setString(1, str1);

pstmt.setString(2,str2);

pstmt.setString(3,str3);

pstmt.setString(4,str4);

ResultSet res = pstmt.executeQuery();

當(dāng)前文章：java圖形代碼菱形 java實(shí)現(xiàn)菱形輸出
標(biāo)題URL：http://jinyejixie.com/article8/ddogoip.html

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