public class Hello { public static void main (String [] args) { System.out.println("Hello,world"); } }
jvm默认 public static void main (String[] args)为程序入口
Exception in thread "main" java.lang.NoSuchMethodError: main //是没有mainHello,world //static部分是在解释时就装入的在main函数前执行
Exception in thread "main" java.lang.NoSuchMethodError: main 怎么将这句去掉啊!!
应加点, public static void main( String[] args)
你缺少主函数(Main) public class Hello { public static void mian(string args[]) { System.out.println("Hello,world"); } } 再试试看呢
Exception in thread "main" java.lang.NoSuchMethodError: main 怎么将这句去掉啊!!
public class Hello { public static void main(String args[]) { System.out.println("Hello,world"); } }试试.
好的,参与一下^_^ public class Hello{ static{ System.out.println("Hello,world"); } public static void main(String[] args){} }//:-)
public class Hello { static { System.out.println("Hello,world"); System.exit(0); }
} 我试试了 这样好用!~
public class Hello { static { System.out.println("Hello,world"); System.exit(0); }
} 我试试了 这样好用!~
public class Hello { static { System.out.println("Hello,world"); } public static void main(String[] args) { System.out.println("test"); } }
import java.util.*;public class ConstructorTest { public static void main(String[] args) { //fill the staff array with three Employee objects Employee[] staff= new Employee[3]; staff[0] = new Employee("harry",40000); staff[1] = new Employee(60000); staff[2] = new Employee();
//print out information about all employee objects for(int i=0;i<staff.length;i++) { Employee e = staff[i]; System.out.println("name="+e.getName()+",id"+e.getId()+",salary"+e.getSalary()); } } } class Employee { //three overloaded constructors public Employee(String n,double s) { name = n; salary = s; } public Employee(double s) { //calls the Employee(String,double) construcor this ("Employee #"+nextId,s); } //the default constructor public Employee() {
}
public String getName() { return name; } public double getSalary() { return salary; } public int getId() { return id; } //object initialization block
public void setId() { id = nextId; nextId++; } //static initialization block
static { Random generator =new Random(); //set nextId to a random number between 0 and 9999 nextId = generator.nextInt(10000); } private String name = ""; private double salary; private int id; private static int nextId; } ConstructorTest.java:66: illegal forward reference nextId = generator.nextInt(10000); ^ 1 error 在帮忙看看!!
就是少了 main函数了,为 public class Hello { public static void main(String[] args) { System.out.println("Hello World!"); } }
在编译时,static部分是首先进行编译的。
试一下把field private String name = ""; private double salary; private int id; private static int nextId; 剪到最前面去。偶用SDK1.5编译不用改就通过 name=harry,id0,salary40000.0 name=Employee #2706,id0,salary60000.0 name=,id0,salary0.0
public class Hello { static { System.out.println("Hello,world"); } } 看到这段代码,可以编译通过,解释也通过,但是没有main()函数,你如何运行这程序? 只有在注入java Hello是就会有这个异常 Exception in thread "main" java.lang.NoSuchMethodError: main
public class Hello { public static void main(String args[]) { System.out.println("Hello,world"); } }
程序的入口应该是 public static void main(String[] args) {}参数String[] arg或者String args[] 都可以如果没有入口,则程序不知道该从什么地方执行,出现错误
public class test6 { public test6() { } public static void main(String[] args) { System.out.println("Hello World!"); } }
public class Hello { public static void main(String[] args) { System.out.println("Hello,world"); } } 如是即可
我一般程序都是以public static void main(String args[]){}结尾的!
{
public static void main (String [] args)
{
System.out.println("Hello,world");
}
}
//是没有mainHello,world
//static部分是在解释时就装入的在main函数前执行
怎么将这句去掉啊!!
public class Hello
{
public static void mian(string args[])
{
System.out.println("Hello,world");
}
}
再试试看呢
怎么将这句去掉啊!!
{
public static void main(String args[])
{
System.out.println("Hello,world");
}
}试试.
public class Hello{
static{
System.out.println("Hello,world");
}
public static void main(String[] args){}
}//:-)
{
static
{
System.out.println("Hello,world");
System.exit(0);
}
}
我试试了
这样好用!~
{
static
{
System.out.println("Hello,world");
System.exit(0);
}
}
我试试了
这样好用!~
{
static
{
System.out.println("Hello,world");
}
public static void main(String[] args)
{
System.out.println("test"); }
}
{
public static void main(String[] args)
{
//fill the staff array with three Employee objects
Employee[] staff= new Employee[3];
staff[0] = new Employee("harry",40000);
staff[1] = new Employee(60000);
staff[2] = new Employee();
//print out information about all employee objects
for(int i=0;i<staff.length;i++)
{
Employee e = staff[i];
System.out.println("name="+e.getName()+",id"+e.getId()+",salary"+e.getSalary());
}
}
}
class Employee
{
//three overloaded constructors
public Employee(String n,double s)
{
name = n;
salary = s;
}
public Employee(double s)
{
//calls the Employee(String,double) construcor
this ("Employee #"+nextId,s);
}
//the default constructor
public Employee()
{
}
public String getName()
{
return name;
}
public double getSalary()
{
return salary;
}
public int getId()
{
return id;
}
//object initialization block
public void setId()
{
id = nextId;
nextId++;
}
//static initialization block
static
{
Random generator =new Random();
//set nextId to a random number between 0 and 9999
nextId = generator.nextInt(10000);
}
private String name = "";
private double salary;
private int id;
private static int nextId;
}
ConstructorTest.java:66: illegal forward reference
nextId = generator.nextInt(10000);
^
1 error
在帮忙看看!!
public class Hello
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
private String name = "";
private double salary;
private int id;
private static int nextId;
剪到最前面去。偶用SDK1.5编译不用改就通过
name=harry,id0,salary40000.0
name=Employee #2706,id0,salary60000.0
name=,id0,salary0.0
{
static
{
System.out.println("Hello,world");
}
}
看到这段代码,可以编译通过,解释也通过,但是没有main()函数,你如何运行这程序?
只有在注入java Hello是就会有这个异常
Exception in thread "main" java.lang.NoSuchMethodError: main
{
public static void main(String args[])
{
System.out.println("Hello,world");
}
}
public static void main(String[] args)
{}参数String[] arg或者String args[]
都可以如果没有入口,则程序不知道该从什么地方执行,出现错误
{
public test6()
{
} public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
{
public static void main(String[] args)
{
System.out.println("Hello,world");
}
}
如是即可