Java上机.doc

4.11题public class s11 /* * param args */public static void main(String args) / TODO Auto-generated method stub int count=0;for(int i=100;i=200;i+) if(i%5=0|i%6=0)&(i%30!=0) count+; System.out.print(i+ ); if(count%10=0) System.out.println(); 结果：100 102 105 108 110 114 115 125 126 130 132 135 138 140 144 145 155 156 160 162 165 168 170 174 175 185 186 190 192 195 198 2004.18题apublic class S411 /* * param args */public static void main(String args) / TODO Auto-generated method stub for(int i=0;i6;i+) for(int j=0;j=i;) System.out.print(+j); System.out.println(); 结果：11212312341234512345618题cpublic class c18 /* * param args */public static void main(String args) / TODO Auto-generated method stubint i,j;for(i=0;ii;j-)System.out.print( );for(j=i+1;j0;j-)System.out.print(j); System.out.println(); 结果:1 21 321 4321 54321654321第五章编程练习作业5.2import javax.swing.*;public class s52 /* * param args */public static void main(String args) / TODO Auto-generated method stublong m=Integer.parseInt(JOptionPane.showInputDialog(null,输入一个整数：);System.out.print(sumDigits(m);public static long sumDigits(long n)long sum=0;long i=0;while(n!=0)i=n%10;n=n/10;sum=sum+i;return sum;5.4import javax.swing.JOptionPane;public class s54 /* * param args */public static void main(String args) / TODO Auto-generated method stubint m=Integer.parseInt(JOptionPane.showInputDialog(null,输入一个整数：);reverse(m);public static void reverse(int n)long i=0;while(n!=0)i=n%10;n=n/10;System.out.print(i);5.4import javax.swing.JOptionPane;public class s544 /* * param args */public static void main(String args) / TODO Auto-generated method stublong m=Integer.parseInt(JOptionPane.showInputDialog(null,输入一个整数：);System.out.print(sumDigits(m);public static long sumDigits(long n)long sum=0;long i=0;while(n!=0)i=n%10;n=n/10;sum=sum*10+i;return sum;6.5import javax.swing.JOptionPane;public class 6.5public static void main(String args)int num = new int10;boolean zero = false;int j = 0;for(int i = 0;i 10 ;i+)int number = Integer.parseInt(JOptionPane.showInputDialog(Enter a number:);if(number = 0)zero = true;if(number != 0)for(j = 0;j = i)numi = number;if(zero)System.out.println(0);for(int i = 0;i num.length;i+)if(numi != 0)System.out.println(numi);6.7public class Exercise6_7 public static void main(String args) / TODO Auto-generated method stubint counts = new int10;int num = 0;for(int i = 0;i 100;i+)num = (int)(Math.random()*10);countsnum+;System.out.println(统计结果为：);System.out.print(随机数： );for(int i = 0;i counts.length ; i+)System.out.print( + i);System.out.print(n出现次数：);for(int i = 0;i counts.length ; i+)if(countsi 10)System.out.print( + countsi);else System.out.print( + countsi);7.1public class Rectangle double width=1;double height=1;String color=white;public Rectangle()public Rectangle(double width,double height,String color)this.width=width;this.height=height;this.color=color;public void setwidth(double width)this.width=width;public void setcolor(String color)this.color=color;public double getwidth()return width;public double getheight()return height;public double getArea()return width*height;public double getAPerimeter()return 2*(width+height); class Testpublic static void main(String args)Rectangle r1=new Rectangle(4,40,red);Rectangle r2=new Rectangle(3.5,35.9,red);r1.getArea();r1.getAPerimeter();r2.getArea();r2.getAPerimeter();Sy