java愛心菱形代碼 java 心形

如何用Java通過#號打出囧字、菱形和空心菱形？

顯示效果是這樣的：

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代碼如下：

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();

}????

}

囧字再看看

求用java語句編寫的代碼 用“*”打印出實心菱形 最好是for語句

public class lingxing {

public static void main(String[] args) {

for (int b = 1; b = 5; b++) { //上部分

for (int c = 5 - b; c = 0; c--) {

System.out.print(" ");

}

for (int a = 1; a = 2 * b - 1; a++) {

System.out.print("*");

}

System.out.println();

}

for (int d = 4; d = 1; d--) { //下部分

for (int c = 5 - d; c = 0; c--) {

System.out.print(" ");

}

for (int a = 2 * d - 1; a = 1; a--) {

System.out.print("*");

}

System.out.println();

}

}

}

用java編寫菱形

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

{

這個小的for是打印每一行前邊的空格

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

System.out.print(" ");

這個是打印星星的

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

System.out.print("*");

這個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();

java 怎樣寫出一個菱形程序？空心和實心

java打印菱形通過二維數(shù)組來打印，實例如下：

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();

}

}

結果如下：

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