class Soapwater
{
private String s;
public Soapwater()
{
System.out.println("Soapwater()");
s=new String("constrcuted");
}
public String toString()
{
return s;
}
}public class Water
{
private String si=new String("Happy");
private String s2="happy";
private String s3,s4;
int i;
float f;
Water()
{
System.out.println("Inside Water()");
s3=new String("joy");
i=50;
f=3.14f;
Soapwater case=new Soapwater();
}
void print()
{
if(s4==null)
s4=new String("joy");
System.out.println("s1= "+s1);
System.out.println("s2= "+s2);
System.out.println("s3= "+s3);
System.out.println("s4= "+s4);
System.out.println("i= "+i);
System.out.println("f= "+f);
System.out.println("case= "+case);
}
public static void main(String[] args)
{
Water b=new Water();
b.print();
}
}Javac提示:
D:\javacode>javac Water.java
Water.java:30: not a statement
Soapwater case=new Soapwater;
^
Water.java:30: ';' expected
Soapwater case=new Soapwater;
^
Water.java:43: illegal start of expression
System.out.println("case= "+case);
^
Water.java:43: ')' expected
System.out.println("case= "+case);
^
4 errors。请大家赐教!
{
private String s;
public Soapwater()
{
System.out.println("Soapwater()");
s=new String("constrcuted");
}
public String toString()
{
return s;
}
}public class Water
{
private String si=new String("Happy");
private String s2="happy";
private String s3,s4;
int i;
float f;
Water()
{
System.out.println("Inside Water()");
s3=new String("joy");
i=50;
f=3.14f;
Soapwater case=new Soapwater();
}
void print()
{
if(s4==null)
s4=new String("joy");
System.out.println("s1= "+s1);
System.out.println("s2= "+s2);
System.out.println("s3= "+s3);
System.out.println("s4= "+s4);
System.out.println("i= "+i);
System.out.println("f= "+f);
System.out.println("case= "+case);
}
public static void main(String[] args)
{
Water b=new Water();
b.print();
}
}Javac提示:
D:\javacode>javac Water.java
Water.java:30: not a statement
Soapwater case=new Soapwater;
^
Water.java:30: ';' expected
Soapwater case=new Soapwater;
^
Water.java:43: illegal start of expression
System.out.println("case= "+case);
^
Water.java:43: ')' expected
System.out.println("case= "+case);
^
4 errors。请大家赐教!
private String s; public Soapwater() {
System.out.println("Soapwater()");
s = new String("constrcuted"); } public String toString() {
return s;
}}public class Water {
private String s1 = new String("Happy");
private String s2 = "happy";
private String s3, s4;
int i;
float f;
Soapwater caseObject ; Water() {
System.out.println("Inside Water()");
s3 = new String("joy");
i = 50;
f = 3.14f;
caseObject = new Soapwater(); } void print() {
if (s4 == null) s4 = new String("joy");
System.out.println("s1= " + s1);
System.out.println("s2= " + s2);
System.out.println("s3= " + s3);
System.out.println("s4= " + s4);
System.out.println("i= " + i);
System.out.println("f= " + f);
System.out.println("case= " + caseObject); } public static void main(String[] args) {
Water b = new Water();
b.print();
}
}
————————————————
能说明一下为什么吗?我是新手,我看不明白为什么要这样改?
————————————————
是因为caseObject没有在前面声明对吗?你在前面加了一句:
Soapwater caseObject ;