[Java Review] 2: Java syntax and more

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The following notes are based on the book: << Head First JAVA >> and video series: 手把手教你用Java基础教程 - 北京尚学堂 - 马士兵

- For loop

The process follows:

  1. execute ep1
  2. if ep2 is true, go to 3; otherwise break;
  3. execute statements
  4. execute ep3
  5. iterate again 2~4
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for (ep1; ep2; ep3){
    statement1;
    statement2; 
}
- While loop
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while(ep){
    statement1;
    statement2;
}
- Do while loop
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//noteic the ';' after while!!!
do {
    st1;
    st2;
} while (ep);
- If else
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if (ep1){}

if (ep1){} else{}

if (ep1){} else if (ep2){} else{}
- Switch
  • i must be int (char, short).
  • if i = 8 , st1 is executed.
  • case can dig through if breaknot existed. ex. if i = 10, st3 and st4 are executed.
  • default is used to handle no-match.
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//example
int i = 8;
switch (i) {
    case 8:
        st1;
        break;
    case 10:
    case 11:
		st3;
    case 12:
    	st4;
        break;
    default:
        st5;
}
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