「java中画菱形画」java的画

admin 2023-01-15 00:57:08 453

今天给各位分享java中画菱形画的知识，其中也会对java的画进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

1、怎样用JAVA绘制一个菱形图案
2、用java编写菱形
3、java中怎么用循环画菱形?
4、如何用JAVA画一个菱形

怎样用JAVA绘制一个菱形图案

java 输出菱形代码：

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("");

}

绘制算法：

1、分为两部分，上半部分和下半部分

2、输出空格部分换个输出*部分

3、最后一个标签需要换行

用java编写菱形

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

{

这个小的for是打印每一行前边的空格

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

System.out.print(" ");

这个是打印星星的

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

System.out.print("*");

这个是打印完一行的换行

System.out.println("");

}

下边的是一样的只不过每一行的空格和星星数和上边是翻过来的

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: 无效的列索引

无效的列索引

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.run(Unknown Source)

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

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

//连接数据库

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中怎么用循环画菱形?

public class T {

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("");

}

如何用JAVA画一个菱形

public class PrintDiamond2{

public static void main (String args[]){

int TotalLayer=9;

for(int layer=1; layer=TotalLayer; layer++) {

for(int space=1; space=Math.abs((TotalLayer+1)/2-layer); space++){

System.out.print(" ");

}

for(int b=1; b=TotalLayer-2*Math.abs((TotalLayer+1)/2-layer); b++){

System.out.print("*");

}

System.out.println();

}

用3个for循环打出菱形，可以改变TotalLayer的值来改变菱形的大小

第一个for循环规定多少行

第二个for循环规定每行有多少个空格

第三个for循环规定每行有多少个星号

然后换行，重复2,3循环直到完成第一个循环

最后菱形完成

关于java中画菱形画和java的画的介绍到此就结束了，不知道你从中找到你需要的信息了吗？如果你还想了解更多这方面的信息，记得收藏关注本站。

标签：java中画菱形画