用java編寫菱形

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

創(chuàng)新互聯(lián)建站專業(yè)為企業(yè)提供桃山網(wǎng)站建設(shè)、桃山做網(wǎng)站、桃山網(wǎng)站設(shè)計(jì)、桃山網(wǎng)站制作等企業(yè)網(wǎng)站建設(shè)、網(wǎng)頁(yè)設(shè)計(jì)與制作、桃山企業(yè)網(wǎng)站模板建站服務(wù)，十余年桃山做網(wǎng)站經(jīng)驗(yàn)，不只是建網(wǎng)站，更提供有價(jià)值的思路和整體網(wǎng)絡(luò)服務(wù)。

{

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(guò)每一行的空格和星星數(shù) ? 和上邊是翻過(guò)來(lái)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(wú)效的列索引

無(wú)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(kù)

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();

怎么用java打印菱形？

java打印菱形方法：

package?circulationDemo;

import?java.util.Scanner;

public?class?Test?{

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

Scanner?input?=?new?Scanner(System.in);

System.out.println("請(qǐng)輸入要打印的行數(shù)：");

int?num?=?input.nextInt();

t1(num);//?正直角

split();

t2(num);//?倒直角

split();

t3(num);//?等腰三角

split();

t4(num);//?等腰倒三角++

split();

t5(num);//?等腰倒三角--

split();

t6(num);//?實(shí)心菱形

split();

t7(num);//?空心菱形(1)

split();

t8(num);//?空心菱形(2)

split();

t9(num);//?空心菱形(3)

}

private?static?void?t9(int?num)?{

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

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

for?(int?i?=?1;?i?=?(num?-?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();

}

}

private?static?void?t8(int?num)?{

//?上半部分

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

//?打印上半部分空格

for?(int?j?=?1;?j?=?num?-?i;?j++)?{

System.out.print("?");

}

//?打印原本實(shí)心的*部分

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

//?僅在一行的開頭和末尾打印*

if?(j?==?1?||?j?==?2?*?i?-?1)?{

System.out.print("*");

}?else?{

System.out.print("?");

}

}

System.out.println();

}

//?下半部分

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

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

System.out.print("?");

}

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

if?(j?==?1?||?j?==?2?*?(num?-?i?-?1)?+?1)?{

System.out.print("*");

}?else?{

System.out.print("?");

}

}

System.out.println();

}

}

private?static?void?t7(int?num)?{

//?打印上半部分

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

//?打印空格

for?(int?j?=?1;?j?=?(num?-?i);?j++)?{

System.out.print("?");

}

//?打印*的個(gè)數(shù)

if?(i?==?1)?{

System.out.print("*");

}?else?{

System.out.print("*");

//?打印菱形里的空格

for?(int?j?=?1;?j?=?(2?*?i?-?3);?j++)?{

System.out.print("?");

}

System.out.print("*");

}

System.out.println();

}

//?打印下半部分

for?(int?i?=?num?-?1;?i??0;?i--)?{

//?打印空格

for?(int?j?=?1;?j?=?(num?-?i);?j++)?{

System.out.print("?");

}

//?打印*的個(gè)數(shù)

if?(i?==?1)?{

System.out.print("*");

}?else?{

System.out.print("*");

//?打印菱形里的空格

for?(int?j?=?1;?j?=?(2?*?i?-?3);?j++)?{

System.out.print("?");

}

System.out.print("*");

}

System.out.println();

}

}

private?static?void?t6(int?num)?{

//?上半部分

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

for?(int?j?=?1;?j?=?num?-?i;?j++)?{

System.out.print("?");

}

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

System.out.print("*");

}

System.out.println();

}

//?下半部分

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

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

System.out.print("?");

}

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

System.out.print("*");

}

System.out.println();

}

}

private?static?void?t5(int?num)?{

for?(int?i?=?num;?i??0;?i--)?{

for?(int?j?=?1;?j?=?num?-?i;?j++)?{

System.out.print("?");

}

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

System.out.print("*");

}

System.out.println();

}

回答于?2022-12-14

java打印空心菱形

Java利用for循環(huán)輸出空心菱形的實(shí)例代碼

編寫程序，在控制臺(tái)上輸出空心菱形，對(duì)角距離為6.

代碼如下：

public class Diamond {

public static void main(String[] args) {

printHollowRhombus(6);

}

public static void printHollowRhombus(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++) {

if (j == 0 || j == 2 * i) {

System.out.print("* ");// 輸出菱形上半部邊緣

} else {

System.out.print("? ");// 輸出菱形上半部空心

}

}

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++) {

if (j == 0 || j == 2 * (size - i - 1)) {

System.out.print("* ");// 輸出菱形下半部邊緣

} else {

System.out.print("? ");// 輸出菱形下半部空心

}

}

System.out.println("");???? //換行

}

}

}

效果如圖：

當(dāng)前題目：java程序輸出菱形代碼 java輸入菱形
網(wǎng)頁(yè)URL：http://chinadenli.net/article20/dogeico.html

成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián)，為您提供網(wǎng)站制作、企業(yè)網(wǎng)站制作、品牌網(wǎng)站建設(shè)、品牌網(wǎng)站制作、建站公司、網(wǎng)站建設(shè)

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主，如果涉及侵權(quán)請(qǐng)盡快告知，我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng)，如需處理請(qǐng)聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載，或轉(zhuǎn)載時(shí)需注明來(lái)源： 創(chuàng)新互聯(lián)