JAVA程序改错改错public class Modify5t { public static void pain(St

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JAVA程序改错改错
public class Modify5t {
public static void pain(String [] args) {
int a = 20;
int b = 50;
int c = sum(a, b);
System.out.println("The sum is: " + c);
}
public int sum(int a, int b) {
return a + b;
}
}
急求!

public static void pain(String [] args) {
public static void main(String [] args) {
细心很重要!不过问题还没解决、、、
解决方案：
第一种方法
sum 方法前面加上static关键字,一定行的.因为main是方法静态方法,静态方法只能调用静态成员.
第二种方法
静态方法想调用实例成员的话,就在main方法里面实例化一个类对象,通过对象名调用sum方法.
public class Modify5t {
public static void pain(String [] args) {
Modify5t M=new Modify5t();
int a = 20;
int b = 50;
int c =M. sum(a, b);
System.out.println("The sum is: " + c);
}
public int sum(int a, int b) {
return a + b;
}
}

JAVA程序改错改错public class Modify5t { public static void pain(St java 九九乘法表public class s99{public static void main(String[] 阅读下面的程序,public class Student{public static void main(String public class SystemTest { public static void main(String[] a public class Foo { public static void main(String[] args) { public class Test { public static void main(String[] agrs) { public class Test{ public static void main(String args[]){ i public class TreeMapDemo { public static void main(String[] public class StaticTest { public static int i=4; public void AL的意思public class RalationOperator {\x09public static void m 求告诉我错在哪里,public class zhishu {public static void main(String 关于case的小疑问public class SwitchOp1{public static void main(Str