1.考察for循环
package face_duixiang_first;
public class Demo{
public static void main(String[] args){
int x = 1;
for(show('a'); show('b') && x<3; show('c')){
show('d');
x++;
}
}
public static boolean show(char ch){
System.out.print(ch);
return true;
}
}输出结果:

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