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´ð£ºÊ×ÏÈ´´½¨Ò»¸ö×Ö·û´®±äÁ¿ÓÐÁ½ÖÖ·½Ê½£º String str = new String(\String str = \£»
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String str1 = \String str2 = \System.out.println(str1= =str2); //true
String str1 = new String(\String str2 = \System.out.println(str1= =str2); //false
String str1 = new String(\String str2 = new String(\System.out.println(str1= =str2); //false
Òò´Ë×Ô·û´®Èç¹ûÊǶÔÄÚÈݽøÐбȽϣ¬Ê¹ÓÃequals·½·¨±È½Ï¿É¿¿¡£ String str1 = \String str2 = \System.out.println(str1= =str2); //true
String str1 = new String(\String str2 = \
System.out.println(str1.equals(str2)); //true
String str1 = new String(\String str2 = new String(\
System.out.println(str1.equals(str2)); //true
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public class Exercise5{
public static void main(String[] args){
int n=1678; int unit; int decimal; int hundred; int thousand; int count;
thousand=n/1000; count=n00;
hundred=count/100; count=count0;
decimal=count/10; count=count;
unit=count;
System.out.println(\°üº¬µÄÊý×Ö·Ö±ðÊÇ£º
\'+unit); } }
//Èç¹ûnΪÈÎÒâÖµ import java.io.*;
public class Exercise51{
public static void main(String[] args) throws IOException{
System.out.print(\ÇëÊäÈëÒ»¸öÕûÊý£º\
InputStreamReader isStream=new InputStreamReader(System.in); BufferedReader bfReader=new BufferedReader(isStream); String input=bfReader.readLine(); int length=input.length()-1; int n=new
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Integer(input).intValue();
while(length>=0){ int divisor=(int)
Math.pow(10,length);
length=length-1;
int output=n/divisor; n=n%divisor;
System.out.print(output+\ } } }
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public class Exercise5{
public static void main(String[] args){
int n=1678; int unit; int decimal; int hundred; int thousand;
thousand=n/1000; hundred=n/100; decimal=n/10; unit=n;
System.out.println(\°üº¬µÄÊý×Ö·Ö±ðÊÇ£º
\'+unit); } }
//Èç¹ûnΪÈÎÒâÖµ import java.io.*;
public class Exercise51{
public static void main(String[] args) throws IOException{
System.out.print(\ÇëÊäÈëÒ»¸öÕûÊý£º\
InputStreamReader isStream=new InputStreamReader(System.in); BufferedReader bfReader=new BufferedReader(isStream); String input=bfReader.readLine(); int length=input.length()-1;
int n=new
Integer(input).intValue();
while(length>=0){ int divisor=(int)
Math.pow(10,length);
length=length-1;
int output=n/divisor; System.out.print(output+\ } } }
6.±àдJava³ÌÐò£¬½ÓÊÜÓû§ÊäÈëµÄ1-12Ö®¼äµÄÕûÊý£¬Èô²»·ûºÏÌõ¼þÔòÖØÐÂÊäÈ룬ÀûÓÃswitchÓï¾äÊä³ö¶ÔÓ¦Ô·ݵÄÌìÊý¡£ import java.io.*;
public class Exercise6{
public static void main(String[] args) throws IOException{ int n; do{
System.out.print(\ÇëÊäÈë1-12Ö®¼äµÄÕûÊý£º\
InputStreamReader isStream=new InputStreamReader(System.in); BufferedReader bfReader=new BufferedReader(isStream); String input=bfReader.readLine(); n=new Integer(input).intValue(); }while(n>12||n<1);
switch(n){
case 2: System.out.println(n+\Ô·Ý29Ìì\ case 1: case 3: case 5: case 7: case 8: case 10:
case 12: System.out.println(n+\Ô·Ý31Ìì\ case 4:
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case 6: case 9:
case 11: System.out.println(n+\Ô·Ý30Ìì\ } } } 7£®±àдJava³ÌÐò¼ÆËãСÓÚÒ»¸öÕûÊýµÄÈ«²¿ËØÊý²¢Êä³ö¡£
import java.io.*;
public class Exercise7{
public static void main(String[] args) throws IOException{
System.out.print(\ÇëÊäÈëÒ»¸öÕûÊý£º\
InputStreamReader isStream=new InputStreamReader(System.in); BufferedReader bfReader=new BufferedReader(isStream); String input=bfReader.readLine(); int n=new
Integer(input).intValue();
int i;
System.out.println(2); for(i=2;i for(int j=2;j<=i/2+1;j++){ if (i%j==0) break; if (j==i/2+1) System.out.println(i); } } }} 9£®±àдJava³ÌÐòʵÏÖ£ºÊäÈëÒ»×éÕûÊý´æ·ÅÔÚÊý×éÖУ¬±È½Ï²¢Êä³öÆäÖеÄ×î´óÖµºÍ×îСֵ£»ÔÚ½«Êý×éÔªËØ´ÓСµ½´óÅÅÐò²¢Êä³ö¡£ import java.io.*; public class Exercise9{ public static void main(String[] args) throws IOException{ final int N=5; int[] intArray=new int[N]; //Êý×éµÄ¸³Öµ for(int i=0;i System.out.print(\Êý×éµÄµÚ\¸öÔªËØÊÇ£º\ InputStreamReader isStream=new InputStreamReader(System.in); BufferedReader bfReader=new BufferedReader(isStream); String input=bfReader.readLine(); int n=new Integer(input).intValue(); intArray[i]=n; } //Çó×î´ó×îСֵ int max=intArray[0]; int min=intArray[0]; for(int j=0;j System.out.println(\×î´óֵΪ£º\ System.out.println(\×îСֵΪ£º\ //´ÓСµ½´óÅÅÐò int temp; for(int i=0;i if(intArray[i]>intArray[j]){ temp=intArray[i]; intArray[i]=intArray[j]; intArray[j]=temp; } } } //½«ÅÅÐòºóµÄ½á¹û´òÓ¡ System.out.println(\ÅÅÐòºóµÄÊý×éΪ£º\ for(int i=0;i System.out.print(intArray[i]+\ } } } רҵÕûÀí ֪ʶ·ÖÏí