JAVA口试题JAVA口试题.doc

结课考核口试部分--分析程序 1 //第一个Java应用程序 public class Hello { public static void main(String args[]) { System.out.println(Hello Java!); } } 2 public class Boy { public void sing(String s) { System.out.println(s); } } class Hello { public static void main (String args[]) { System.out.println(Hello Java!); Boy boy1=new Boy(); boy1.sing(I am a boy!); } } 3 import java.awt.*; import java.applet.*; public class Example3 extends Applet { public void paint(Graphics g) { g.drawString (Hello World!,20,20); } } 4 public class Ex { public static void main (String args[]) { char x=a; int y=x; float z=x; System.out.println(y); System.out.println(z); } } 5 public class Ex { public static void main (String args[]) { char x=a; int y=12; float z=12.34F; System.out.println(x+y+z); } } 6 public class Ex { public static void main (String args[]) { int x=5,y=2; char a=m,b=k; boolean i=true,j=false; boolean k=(3*xy+20)||(a!=b)j||(!i); System.out.println( k＝+k); } } 7 public class Ex { public static void main (String args[]) { int a[]=new int[5]; System.out.println(a数组的长度是：+a.length); int score[][]=new int [2][3]; System.out.println(score数组的行数是：+score.length); System.out.println(score数组的列数是：+score[0].length); } } 8 public class Ex { public static void main (String args[]) { int a[]; a=new int[2]; System.out.println(a); a=new int[5]; System.out.println(a); a[0]=1; a[1]=2; a[2]=3; a[3]=4; a[4]=5; for(int i=0;i5;i++) System.out.print(a[i]); System.out.print(\n); } } 9 public class Ex { public static void main(String args[]) { int x=2; if(x50) System.out.println(x+ 是大于50的数); else if(x10) System.out.pr