Android基本數據類型測試
/*
* 在界面按鈕上設置了 onClick="doClick",
* 每一次點擊按鈕時,都會執行這個方法
*/
public void doClick(View view) {
byte a = -128;
byte b = 127;
// 10000000 00000000
short c = -0x8000;
// 01111111 11111111
short d = 0x7FFF;
int e = -0x80000000;
int f = 0x7FFFFFFF;
long g = -0x8000000000000000L;
long h = 0x7FFFFFFFFFFFFFFFL;
// 獲得界面的文本控件對象
// 在文本控件中顯示上面幾個變量的值
TextView tv =
(TextView)
findViewById(R.id.textView1);
tv.setText(String.valueOf(a));
tv.append("\n"+b);
tv.append("\n"+c);
tv.append("\n"+d);
tv.append("\n"+e);
tv.append("\n"+f);
tv.append("\n"+g);
tv.append("\n"+h);
////
float i = Float.MAX_VALUE;
float j = Float.MIN_VALUE;
double l = Double.MAX_VALUE;
double m = Double.MIN_VALUE;
tv.append("\n"+i);
tv.append("\n"+j);
tv.append("\n"+l);
tv.append("\n"+m);
////
char n = 'a';
char o = 97;
char p = '\u0061';
char q = '\u4e00';
tv.append("\n"+n);
tv.append("\n"+o);
tv.append("\n"+p);
tv.append("\n"+q);
}
* 在界面按鈕上設置了 onClick="doClick",
* 每一次點擊按鈕時,都會執行這個方法
*/
public void doClick(View view) {
byte a = -128;
byte b = 127;
// 10000000 00000000
short c = -0x8000;
// 01111111 11111111
short d = 0x7FFF;
int e = -0x80000000;
int f = 0x7FFFFFFF;
long g = -0x8000000000000000L;
long h = 0x7FFFFFFFFFFFFFFFL;
// 獲得界面的文本控件對象
// 在文本控件中顯示上面幾個變量的值
TextView tv =
(TextView)
findViewById(R.id.textView1);
tv.setText(String.valueOf(a));
tv.append("\n"+b);
tv.append("\n"+c);
tv.append("\n"+d);
tv.append("\n"+e);
tv.append("\n"+f);
tv.append("\n"+g);
tv.append("\n"+h);
////
float i = Float.MAX_VALUE;
float j = Float.MIN_VALUE;
double l = Double.MAX_VALUE;
double m = Double.MIN_VALUE;
tv.append("\n"+i);
tv.append("\n"+j);
tv.append("\n"+l);
tv.append("\n"+m);
////
char n = 'a';
char o = 97;
char p = '\u0061';
char q = '\u4e00';
tv.append("\n"+n);
tv.append("\n"+o);
tv.append("\n"+p);
tv.append("\n"+q);
}
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